Feel free, it wouldn’t bother me in the slightest
He just need to send it upstairs to VAR. They will sort it all out for him.
You can't just stop him reffing Liverpool games, that would never work. All league games can directly impact each team.
They either give him a serious slap on the wrist and a suspension for a while, or he's finished. I suspect the latter.
Only has himself to blame.
In theory it would work the same way as when refs declare the club they support so in this case he's a Notts County fan so he is not allowed to ref Nottingham Forest games. They could just add Liverpool to that list but I very much doubt they'll do that.
It's more than that, he mentioned Liverpool, Klopp and Germans. So it can't be seen he will be fair to any germans, from international games against Germany, domestic games with German managers or players. So that includes Brighton (their manager is German), it includes Arsenal (Havertz), Spurs (Werner) etc etc.
His career is done in Europe.