Biden is useful in establishing this as the status quo. Concentration camps on the border are just run of the mill, crackdowns on protestors is a-ok and genocide is just a thing you need to get as a treat.
I don’t doubt that Trump could do worse in a multitude of areas, but it wouldn’t be possible without the legitimacy that is given to positions like these by Biden or dems at large.
Guantanamo is still running. I remember when libs were up in arms about it during the Bush era, just like the kids in cages with Trump.