The only thing that these sorts of statements serve to prove, is that he was correct about some of his concerns, atleast, in regards to the prevalent type of thinking amongst his political opposition.
I think we have already seen how well it has been going for the U.S., this whole "replacement" of such people. Casting people aside doesn't make them go away. For now, they still possess a right to vote, and a freedom to speak, as much as this offends some people's sensibilities. Trump being the president of your country, makes that rather evident.
It seems fairly obvious to me that many Americans, and not just guys like
@Fight To Win, are setting themselves up for a "fight", an inevitable conflict between two completely differing ideologies. Don't know why it's so outrageous, then, to point it out. Perhaps it's just a matter of not wanting to provoke such a fighting response before you've properly "boiled the frog", and set the odds in your advantage. And that's a rather "slow process" indeed.
If you're openly talking about "replacing" your opposition, what else can you expect, but a fight? It's not as if people are just going to stand there and take it. You're contributing to that sort of thinking just as much as he was.