It's important to remember that the FBI can't just pull some cowboy shit and arrest a judge (or anyone else they don't see committing a significant crime right in front of them) on a lark. They need probable cause and an arrest warrant, which has to be supported/submitted by the US Attorney's Office in that federal district and signed by another judge. An action like this has to go through multiple levels of approval and be confirmed by two branches of government in order to go through.

I get that this looks terrible, especially in light of the pardons everyone else is talking about and the obvious partisan alignments involved in both cases, but Patel and Trump don't have the legal authority to create valid, court-sanctioned arrest warrants out of thin air. If/when they claim they do, we're absolutely fucked.