Nigeria is a shit hole. It's the home of Boko Haram and a host of other terrible people. They ruined their country because they are sucky people. Sucky people deserve to be made fun of, so what's the problem?
By that logic - America is a shit hole. It is the home of Donald Trump and his sycophantic band of Kooks, Nazis, Klansmen and a host of other terrible people. They've attempted to subvert democracy and rule of law by attacking the very institutions that are required for our system of government. Shitty people deserve to be made fun of, so what's the problem?