It's not just an issue of politics, it's an issue of being associated with an event that some people (and probably an overwhelming majority of the city), don't want to be associated with.
I don't mind UFC, but the last thing I want is a bunch of drunk affliction/ed hardy wearing scumbags a few blocks from my apartment.
I know that there are plenty of people that would be fine, but it only takes a few.
The card looked like it was going to suck anyways.