Referees do not become PGMOL officials by not knowing what a small push can do, even if it might appear otherwise. I think what we are looking at here is whether the Fulham defender was just not strong enough in the first place & knowing this he then went to ground. However, had the United forward been penalised and therefore the goal ruled out, then I would not have had a problem with that. Also, playing Devils Advocate for a second, if the Fulham Manager doesn’t think that United’s penalty was a foul, then he shouldn’t be thinking United’s goal was a foul either.!!!