Nigeria is a conglomerate of nations brought together by the British colonial government for administrative convenience and is held together by the armed forces and a greedy political class, not least foreign interests, for the purpose of sharing oil wealth. Nigeria is a country of peoples with diverse ethnicity, religions and irreconcilable worldviews. It is like bringing Israel, Syria, Lebanon and Egypt together to form one country and then handing over the military to one group to ensure that the country remains irrespective of what the constituent groups might feel. If for instance, the oil wealth that sustains such a country is in the Lebanese area, the military power would be handed to the Egyptians or the Israelis. This is what Nigeria is.
Now, what this has done is that Nigerians see themselves as Igbo, Yoruba, Hausa, Fulani, Ijaw, Tiv, Kanuri, Jukun and so on. Just as you would imagine to be the case in a country that has Jews, Syrians, Lebanese and so on as citizens. Beyond this there is also the very strong religious factor. As you probably know, Nigeria has a roughly even Christian and Muslim population, with the former being predominant in the South and the latter in the North. You can already see that from the religious perspective, Nigeria is an impossible experiment. This may not be politically correct, but the truth is that both religions cannot exist side by side peacefully. Again people see themselves first as either Christians or Muslims. Being Nigerian is third in the pecking order, after religion and ethnicity.
The effect of these is that leaders often emerge, not on the strength of their capabilities, but as religious and ethnic champions. Thus, as opposed to having charismatic leadership, we have ethnic and religious warriors who often don't see the need to be accountable because what brought them into power in the first place is not their capacity but religious and ethnic sentiments. Therefore, even when they mess up the entire space, Nigerians cannot protest against them because like I said, there are really no Nigerians.
If the leader is a Fulani Muslim from the North as we have now with Muhammadu Buhari, no matter how terrible he performs, the Fulani and the Hausa - who often exist side by side -will still side with him and any attempt by the Igbo for instance, to protest against him, will be seen as a fight against the Fulani which they will resist. So, for Buhari to ensure that there can never be a question of uprising against him, he turns into an ethnic champion by promoting the interest of his ethnic group and his religion above the others. This scenario exists, too, in various states where there is a multiplicity of ethnic groups.
Of particular interest in this case is Plateau State where the Israeli veteran lived. Plateau used to be a very peaceful state with clement weather. The choice destination for many Europeans in Nigeria because its weather is close to that of Europe. This was when the state was inhabited mainly by the indigenous Christian population. Now, with the entrant of Muslims and the resultant friction between the two religions, Plateau has become a state largely in ruins on account of religious and ethnic crises. In a sense, Plateau is a mini Nigeria.
Another important dimension is that Nigeria is not a productive country - does not have a productive economy but a consuming one. It is basically held together by oil proceeds from one region, the Niger Delta region of Southern Nigeria. To this extent, competence is hardly a factor in leadership selection because leaders are often elected to sit on oil wealth and distribute same. Therefore, each group sees their own person being in power as an opportunity to get access to this oil wealth. That is why, for example, you heard people like the current vice president, Yemi Osinbajo, arguing that the reason his Yoruba people should vote for Buhari during the 2019 election held months ago, is that Buhari will hand over power to the Yoruba in 2023. Osinbajo is a professor of law and a pastor of one of the largest Pentecostal churches in Nigeria, the Redeemed Christian Church of God, yet he makes an argument like that. This should tell you how deep-seated this problem is. Now, if the Yoruba were to go with this line of thought - even though my personal opinion is that it is just empty hope - they would have voted for Buhari in 2019, not on the strength of what he has done or intends to do, but in the expectation that they will get power and therefore access to oil wealth after him. This should explain why leaders get away with everything.
Also deriving from this is the fact that the political class themselves see political offices essentially as avenues for personal, family and group aggrandisement, not vehicles for service delivery. This is why, for example, Buhari would argue that he would distribute political appointments on the basis of the votes he got. The states that gave him more votes, he said, would get more appointments. Again the interest is not nation building because there is no nation to build. Thus, Nigeria is structured in such a way that political office holders get huge sums of money as salaries and allowances. The fastest way to wealth therefore, is joining politics, not starting a company, which of course, you are going to have to face bottlenecks and pay bribes to start.
This mindset has become pervasive. The police man sees his job primarily as an opportunity to exploit the weak. He mounts roadblocks ostensibly to check crime, but in reality, he is there extorting commuters. The civil servant doesn't see his post as a platform for service delivery, but an opportunity to exploit those seeking government service. The man at the corporate affairs commission does not see his job in terms of facilitating start-ups, but putting roadblocks to collect bribes from prospective entrepreneurs.
As you would probably expect in such a clime, elections are a sham and votes hardly count. This is another critical point. Until the people are able to vote out leaders who don't perform, there won't be accountability.
To summarise, Nigeria is simply a country forced together by the military and the political class for the purpose of distributing oil wealth. It is more like a criminal Enterprise.

We were never force together, a national that force together will not last this long and we are still waxing strong.

Hello , pls what are you trying to insinuate from your lengthy episode