Some people definitely agree with the xenophobia. That sort of anti immigrant ideology is on the rise outside of the US too. They might not like Trump but also not quite fully disagree with what the MAGA people stand for.
I mean ffs people are now finally getting sick of Trump, but not because the damage they've done with deportation but because they're spending money on war and food and gas prices went up as a direct result. Some of the people that are anti Trump these days just care about their bottom line.