My heart breaks to hear of the corruption and violence Nigerians face today. I often complain of corruption here in America, and I've been beaten without cause by American police, jailed, and otherwise harmed unlawfully here. But I have never faced summary execution, or been subjected to arbitrary lethal violence in the way you have described in the OP.
I am convinced presently that there is no just and lawful national government on Earth today. No NGO, extranational, or transnational institution of nominal significance exists today that the Nigerian people, my own, nor any jurisdiction can turn to for help, because all are the fruit of corruption, dependent on it, and the best that can be hoped for is that the competitors for power amongst the cabals are able to profit from aiding those unjustly oppressed enough to disrupt that oppression.
America has brought democracy to too many countries with abhorrent consequences for me to expect American help would usefully resolve issues in Nigeria. Afghanistan, Iraq, and Libya all provide meaningful examples to any that might suspect otherwise.
However, people around the world today are all similarly protesting the brutality of the police claimed to be intended to protect civilians and promote just and peaceful society. From New Zealand and Indonesia to Germany and France, from Kyrgyzstan and Uzbekistan to Chile and Argentina, and all points in between with but few and lucky exception, the people protest militarized police and the thuggish brutality undertaken to protect the corrupt predator class in control of governments. Clever progagandists do everything they can to mislead and derange protests, just as has been very successful here in the USA in a decade since the Occupy Wall Street protests were infiltrated with identity politics and now are used to pit the people against one another using every possible division; left, right, black, white, old, young, male, female, Muslim, Christian, gay, straight; where before the people had rightly targeted financialization, corruption, and deceptive policies.
Unified against predatory and corrupt overlords we cannot fail. Divided by the deception of the enemedia and clever populists against our fellows, we cannot succeed.
While I have not faced tanks and machine guns yet, I expect to before the decade is out, here in America. Every people of the world, and all the civilians just intent on living in peace and passing on their legacy to their children, are in the same boat regarding corruption and the overlords that seize power using it. The enemedia owned by those predators is used to trick us to hate and fight our fellows rather than the actual enemy we have in common.
On Hive we can speak freely, one to another, and the lying 'fact checkers' and censors cannot impede our mutual aid and understanding. Free speech is the critical mechanism that enables prosperous and felicitous society as folks use it to join their voices in unison against the criminals seeking to silence us all.
Thanks for using that mechanism to speak forthrightly and enable my understanding of the plight of Nigeria and it's peoples. I only hope we can speak of how to coordinate our actions to protect one another and prosecute the criminals that seek our wealth, freedom, and our very lives, together.