Invasion is the word I've been using since the 1990's. I've been treated like a bigot every time I use the term in this context.
It seems to me that about half the population is in such deep denial that they would have to be personally attacked for them to believe that we've been invaded and are being occupied by "diversity", oops sorry, I meant the white genocide advocates.
Anyone who loves the third world is welcome to go live there. Why do we need to invite over 6+ billion people, who hate us, to take a crap on our dinner table?