Personally, I think it's time to differentiate between fans who go to the games and people who go because they're given tickets, etc. Not all fans have the extra income to go, even if tickets are only $30, so it's not fair to call them out. There are people who have family obligations on Sundays... they put family first and I don't see how you can call them out either. Those fans who could afford tickets and were able to be at the game were there.
As for those who left early, that completely blows. I looked behind me with about 4 minutes left to go in the 4th and the entire row had left. Total bull , but at that point I think you can say that those people who leave aren't real fans.
So, do Spurs fans deserve a championship? If you answer yes to the following questions:
1. When you go to the games, do you cheer, or at least stay, til the bitter end?
2. If you can't go to the games, are you glued to a tv, living and dying with every possession?
3. If you could afford it, would you buy season tickets?
Then yes, Spurs fans deserve a championship.