Murray plays for GB in wimbledon and he plays for GB in the olympics, what possible reason could someone have to only support a player in one competition and not another when they are playing for the same team/nation
He plays as an individual in Wimbledon, and he plays for Great Britain in the Olympics (and the Davis Cup). If you asked him who he represents in Wimbledon he'll no doubt say Scotland - not Britain. And rightly so - I applaud his national pride. He's even gone so far as to say he supports anyone who's playing against England - and I'm lead to believe he wore a Croatia shirt when England were playing the Croats. Again, I have no problem with that - he's supporting Scotland as he should, and whilst I personally feel differently toward the home nations (I generally want them to do well, but of course I want England to beat them) that's personal preference and I've no problem with people who want to see the other home nations perform poorly.
If we had an English tennis player ranked in the top ten I'd be cheering him on at Wimbledon, and hoping he beat the Scotsman - because I'm English and I support my country.
This isn't the Grand Slam though. This is the Olympics - and he's playing for my team.
If a player in the england squad showed any lack of pride or commitment, he would be castrated and chucked out of the squad.. if a player in the england squad was picked but he didnt want to play for england.. I'd call for his head definitely... I've called for rooney to be dropped.. he always underperforms playing for england. However, I do feel every single englishman showed passion and pride during the recent Euros.. there were some players that didnt play very well, but none of them showed a lack of commitment. Take a look at Gareth Bale if you want a lack of passion and national pride in a footballer... he didnt think team GB could win a medal so didnt want to play for them!
Very few England players performed as well as they should have in the Euros. They often went minutes without touching the ball, match after match after match. There's having bad matches, and then there's being rubbish. If a bunch of top players are rubbish game after game then they're going to look like they're not really trying.
Or perhaps they're just not used to playing together, and need more practice. If they bothered to show up for friendlies that might help. But half the time they back out of them, usually citing medical reasons, when you know they'd be perfectly fit to play for their club and/or nation in an important competitive match.
If you're called up to play for your nation be proud and try your hardest.
Olympians don't need to be told that. Most footballers do, after they've got a few caps and established themselves in the first team...