For example, it doesn’t mention the continual entrapment of often mentally ill US Muslims, using informants to persuade and lead them into committing crimes, for which they were then arrested and charged. Only recently has the main target (but not only) of such activity changed to right wingers. We could probably easily add a dozen more subsections to that page from the last two decades. Some were mentioned in these comments already.
It seems to me that television and movies convinced a lot of modern conservatives that the FBI were good guys, while modern liberals have decided they’re good guys simply because they’ve been overzealously targeting their political enemies. But that’s simply by accident, not because of any actual ideological alignment.
You’re also forgetting that the net achievements of the Church committee were basically nil. The government succeeded in destroying lots of records and ultimately was able to continue nearly all the same behavior and worse anyway. Since then we’ve had murders of American citizens, torture scandals, national surveillance beyond anything Hoover could dream. Heck, just a few years ago, the CIA got busted spying on Congress after it began investigating CIA crimes, then lied about it, got caught red-handed, and the perp not only got off scot-free, but is regarded as a Resistance hero.