Not just to defend United but Fergie at least was scouting someone who would go on to be immensely important to the team - if Klopp was doing the same I wouldn't have an issue. Klopp just wanted his holiday and quite clearly has a grudge against the FA.
I suppose my main point from this would be - if you were in the same situation but had to play Manchester City, Chelsea etc. do you think Klopp and the boys would still be on holiday? If the answer is no then he, especially, should have been there.
What's done is done now and a precedent has been set that will unfortunately probably see more and more teams doing the same thing.
And I don't think anyone was saying that you in particular would kick up a fuss, just Liverpool fans in general. Just as fans of the other teams have done for Klopp.
Good on the young lads for winning, though, I just think Klopp should've been there - even if he was only in an advisory capacity letting the coaches who know the players better deal with them. And props to them for dropping ticket prices.