No, it's not. If it was offensive PI then THAT should have been called.
To say this nullifies ANY call is pure homer BS.
According to the refs themselves it wasn't picked up because of the face mask. They appear to not have seen that at all. It was picked up because one ref thought it was face guarding. That is false as there was contact.
In a perfect world maybe you have a case for offensive PI, however that flag should NOT have been picked up based on the contact they DID see.
THAT is the end of story.
If you say so. They probably said "both sides were hand checking, no foul". Depending on where the penalty occurs, one official overrules others all the time. The only issue here was announcing it too soon. If Pete doesnt' do that, then everyone here is looking at a different play to bitch about