Besides: De-Federating is a mistake. That'll lead to them reinforcing their bullshit unchallenged inside of their echo chambers and draw in everyone who comes by and stays long enough. That's exactly what strengthens the AFD in Germany or certain religious groups in the US. The only chance you have against them is engaging them and hack off little chips of their construct of lies and hatred until it hopefully collapses.
De-federating so you don't see them and then pretending that solves anything is like throwing a blanket on a unexploded bomb that has slammed into your bedroom: You can pretend it's not there all your want, until one day where the cover is being lifted rather radically.