Don't think McHugh's fist challenge was a foul, so not happy with the yellow card, I think the second challenge being mentioned was simply the Rangers player (Morelos?) running into him, McHugh just stood his ground. I don't really have an issue with the penalty, although that is my interpretation and not necessarily the current laws of the game, I don't have an issue with the yellow card although. I do have an issue with it only being issued because Morelos demanded it.
As rash as McHugh seems to be at times it perhaps is telling that it was when he was no longer there to protect the defence that we took a thumping.