

I mean, you have to go where the evidence takes you, even if you don’t like the results. The best thing you could perhaps say about Biden or Obama, was simply that any of their direct participation in border patrol activities followed rule of law.
Generally, CBP/ICE has stayed above much direct scrutiny or supervision, and if an individual doesn’t have reporters, lawyers, or family asking after them (sometimes even then) a lot can be hidden even from administration.
It’s very likely Trump did not do much to “push” ICE’s behavior, he just enabled them, and they reward him by threatening his direct opponents.
Some context:
The basic idea is, while Trump aims for very visible rhetoric to inflame his racist base, ICE’s presence has still gone up regardless of which president is taking the chair. In fact, Biden beat Trump’s deportation numbers (and I’m sure given his ego, he aims to inflate that further, and finds due process one of his obstacles).
One thing that can be said is that when ICE has been in the news, it was never visibly aiming for cruelty under Democratic presidents. But that’s also only accounting for the cases that we know about. And, the last article points out how even through a full term, Biden not only failed to address the growing worries of cruel behavior within ICE, but built them a new quarter-billion-dollar headquarters.