They are causing a lot of problems right now, yes. That's a big concern and a problem for white people right now, as it obviously affects white people more than what Africans do in e.g. Africa or Asia. (And don't forget Australia, and maybe South America in there, though I know less about the trends in crime and stuff in South American countries. And South Africa.)

The alt-right does sometimes discuss Africans in Africa too though. Like the "Africans in Africa have X IQ and I think we probably shouldn't invite more here." This is also a problem, because many recent arrivals from Africa are also causing problems.

Sometimes it is a racial superiority thing negatively comparing the accomplishments of Africans to those of Europeans. Which I guess there's some value in if there's some truth in it, and an inaccurate picture has been painted of everyone "being equal". If it's needed to undermine a false narrative, then I guess there's value in it, but I think it goes too far sometimes -- there are smart people in Africa, and various African groups have accomplished things and are accomplishing things. And whites thinking they are simply superior can cause problems due to overconfidence and underestimating Africans, too.

And even if Western Africans were causing no problems, it still creates a demographic problem for whites, making those spaces, well, less white. Less of a homogenous homeland for whites, where whites can exist and continue our various ethnicities. That problem is an issue of immigration displacement bordering on invasion at this point. People complain about the problem with job replacement occurring with high-skilled immigrants in high-skilled positions too, for example, though there is less "their IQ sucks!" talk in these discussions.

If there were no African-descended people in Western countries I think the vibe would probably be pretty different, though there would probably exist some negative attitudes towards Africans like there are towards any group. There might still be issues like "should we support whites doing charitable work in Africa." "well no they're too dumb and violent" would probably still be an argument people would try to make.

Is that the sort of thing you want to ask about? Or have I misunderstood what you want to discuss? Were there points you wanted to raise about traits specific to Africans in Western countries that don't apply to Africans elsewhere?