On that basis you might think he has more reason to give decisions against Chelsea following the Mikel allegations but Chelsea have been willing to have him officiate.
Picking and choosing refs and even applying rules about a referee's place of birth, place of residence or allegiances is a can of worms, as is making them answerable in public.
If anything, he may have been swayed yesterday by that being his first appearance at Goodison for 6 years, having been prevented from refereeing there due to poor performance in a derby match.
It's possible he's simply someone whose judgement is poor and who should be demoted to the lower leagues. Harsh on the lower leagues but at least we wouldn't have to put up with him.