Can we just all put this 'crying' issue into its proper context?
This is a 21 year old lad who over the last few days has been under untold stress. You can say he brought it on himself - fine; you can say he gets paid a king's ransom - no doubt. However he's a young lad who for all his talent and financial reward will never have been mentally prepared for the stress he's now going through, played out in front of thousands of fans, and based on what I've seen of the lad he is probably agonising over what fans think of him versus what we believes he wants to do with his career.
The lad is mega stressed - classic signs - and crying on the spot like that is a sure fire indication of the extreme anxiety he is feeling, not because he's upset about being called names or whatever. Try and ringfence that perspective, and put aside the fact that he is talented, privileged, etc.
You may still feel that he should grow up - fair enough, but just understand why it probably happened.