Just look at COINTELPRO for the most egregious example.
Then there's Waco, Ruby Ridge, the campaign finance corruption, infiltration of latin American governments, and modern operations similar to COINTELPRO to take down various movements like occupy wall street.
They are a mafia, not some benign group that can be blindly trusted with secret carte blanche powers.
But none of that seems to have any bearing on what happened here at Twitter, which is so far - to put it mildly, given the amount of noise made by Musk et al - underwhelming.
If you feel differently then that's fine but personally I think there are far bigger transgressions by the FBI than requesting that Twitter take down objectionable content and rabble rousers.
In NL Twitter was successfully weaponized by our most despicable - outright pro-Nazi - political party and the aftereffects are still felt today. Compared to what happened in the US it obviously pales but you have to wonder how the 6th of January 2020 would have ended if it weren't for the good contacts between the FBI and Twitter.
Not all such contacts are bad.