How would Homo erectus fare in today's world?
Provided they didn't have to compete with modern humans for resources, they would probably do just fine. The problem is that there is no place they could live that they wouldn't have to compete with us. Even the most "primitive" of human cultures, that live the most similar to how they did, still vastly out-perform them on exploiting the resources around them.
As long as they lived among other Trump voters, nobody would notice.
Ask Donald Trump - he's one of them. Accent on the "homo."
Ed Gein Jr.
They seem to be doing quite well, they have their own community and a flag!