As for the first goal, if we had scored it and the referee had disallowed it, I can just hear Alan Smith or whoever saying "nah. You can't touch the keeper like that. It's always going to be given as a foul. Every referee is going to give that",
and everyone would just accept that.
Likewise yesterday, if it had been disallowed, people would be saying "oh, Liverpool got away with one there", and then it would have been forgotten about, because they all know that it's always given as a foul (whether or not we agree with the keeper getting so much protection)