Trump never talked about cutting ourselves off from the rest of the world. He talked about getting fair treatment and fair dealing with the rest of the world and focusing on what is in the best interests of America and putting our own interested first.
Isolationists just presumed that meant isolationism as that is consistent with their own beliefs. Trump has worked internationally his whole life. He understands we csnt ignore the world and pretend it doesn't exist or doesn't affect us, but we can assert ourselves in our own best interest and disregard matters that are not in our interests to get involved with. It just so happens that we benefit immensely from our global superpower and economic status, and Trump is using that to maximum effect at minimum cost to benefit America instead of being always deferentially egalitarian with the rest of the world. Trump knows wars are huge wasters of capital and wealth and there are usually better options, but occasionally our foes require us to put them in their place.
