I see that the African Union (representing all 55 countries in the continent), the UN and even the Vatican have all condemned Trump's remarks as racist and insulting etc.

I agree with Iains that most people in the West haven't a clue as to the appalling lives people in the so-called Third World lead. They aren't just poor: many are dying on their feet and suffer daily, with disease, parasites, malnutrition, disgusting water and sanitation arrangements, untreated injuries etc etc. I have seen this myself, and my husband has lived it, in his early life. But to declare they live in a shit hole is cruel, incredibly rude and very very regrettable.

As to African immigrants being problematic, in UK my husband had to jump through hoops to receive his marriage visa all those years ago.
Interestingly, where he works he has seen many young (white) people come to join their cleaning team and quit after a couple of days, saying it's too boring, too hard or they can't get up early enough to show up on time. But he has never ever let the school down, and they all absolutely treasure him (so they tell me!)