The same holds for the left wing.
No it doesn't, do you mean the American right? There are so many right wing parties in this world, the American right is just a small fraction of them. Maybe we mean the Switzerland right? There aren't many poor people in Switzerland.
It's funny you mention Switzerland, surely you must have seen their far right's party compaign posters? The ones with the sheeps or rotting apples? How is that not marginalization and stigmatization?
I don't know how "radical" you can call it since it was popular enough to get the White House and most of congress. Twice.
I really don't see what in right-wing ideology has ever served the cause of minorities and marginalized groups, even before MAGA.