Some Malaysian guy working for the UN in Congo said it not me.

Yeah, but your arguments have been supportive of his statements.

The problem is tribal regions in Africa are so small that the countries would be tiny.

Maybe small for Africa, but that's not exactly small compared to the rest of the world. Are you arguing that countries like Monaco shouldn't exist?

Plus there is a lot of aggression between the different tribes, they have been at war forever but luckily when guns got to the country it was with the whites keeping law and order.

Lol, what? That's some Rhodesia level copium you're smoking there.....

First of all, in most cases the ethnic conflict is a direct result of European powers elevating certain ethnicities and utilizing them to keep their neighbors in line. Secondly you are ignoring all the systemic violence and outright genocide that Europeans used to keep "law and order".

It's not like anyone even today and can say what the borders should have been.

I'm sure some people who live in Africa will disagree with this sentiment....

Sure there are mistakes and there would be an issue with borders however they are divided. But at some point it's what's you got and how you got to deal with it.

And yet, this is only a problem in parts of the world that were colonized by Europe after the 18th century.

This is the result of countries colluding together to strip territories away from their inhabitants via land marks on a map. The same thing happened in the Middle East after the collapse of the ottoman empire. It's not fucking rocket science my dude.