Yes indeed. Thank you for reminding everyone of this. I believe they also financially back a lot of people on the right, Trump and his family are on the record saying that they were financially saved by Russia some years back, which would explain their attempts to create a secret back channel to Putin.
They don't care about the issues, they care about power. Immigration only really mattered to Republicans because immigrants make a convenient scapegoat for them.
The problem is isolationism often leads to situations we can't ignore, as with the world wars. We were isolationists before then, and we benefited greatly from our international involvement ever since. We are the richest country in the history of the world largely thanks to our geography and international involvement. The dollar is the world's fiat currency. We prefer not to fight wars for other people, rather we usually just fund and arm groups that share our interests.
If we withdraw back into our shell, we lose the privileged place we have in the world.
Now Trump's shill judges are helping him with stochastic terrorism. The corruption of our justice system will reverberate through this country for generations.