Well I never betted against the club i support I'll rather bet on other matches. However this brings us back to the question, would you bet against the club you support ?
It depends on the situation, if I need money and if based on my analysis the club I'm supporting is a huge underdog with no way to team I can bet against the team or club I'm supporting as a gambler we are looking for an opportunity to make money so why let this slip you, there are will be times that you can show your support to your favorite team.
When I was betting on horse racing I had a list of favorite horses that gave me a lot of winning combinations, but there were times that I bet against them when they were handicapped and they were up against strong horses It was just the way things on sports betting, you can remain loyal and still make money.
It's different if you are a very loyal supporter and you do not need money and just here out of loyalty to the club you're supporting.