That leaves everyone using it with no non-political options -- there are political implications whether you stay or go.
Leaving it now (when a bunch of others are going too and the front man has recently been dropping bombs) is probably the less political option -- especially in the long term if you think the site is going to get more radical.
Bonus points for moving to a federated alternative, since you can move away from big tech (which is more of a principled stand and/or tactical move than a political statement, IMO.)