Meh. This story reads to me like the culprits were simply some regular miscreants who seized on Prop 8 as an excuse. It strikes me that actual gay rights activists wouldn't have waited until two months after the election to strike, and would have picked a more deserving target than one of the most liberal Catholic parishes in the state (instead going after, say, an LDS temple). If my surmise is correct, we might see a synagogue vandalized soon in similar fashion,
ostensibly over Israel's actions in Gaza.
We have gone down a strange road when we view someone beating up someone at random just because they're psychotic as being less worse than beating someone up because of their ethnicity/religion/sexual orientation.
You're taking as your unstated, and incorrect, premise that we don't treat those who are considered likely to reoffend as a result of mental illness any differently than we do a regular offender. In fact, those judged criminally insane can be committed and may spend more time confined as a result.
But I see all the usual "arguments" against hate crimes legislation are being trotted out in this thread, all of them (as usual) willfully ignoring the actual point of such legislation, which is that those who injure others because of their ethnicity, religion, sexual orientation, etc. are considered likely to reoffend as long as the target group has members. Now, there are perfectly legitimate objections to be made against hate crimes legislation, the foremost being that it is inconsistent with the basic principles of the rule of law to punish people for crimes they
might commit at some future date, which is essentially what imposing additional punishment for a "hate crime" does. But then again, we also punish repeat offenders more heavily than first-time offenders (e.g. through "three strikes' laws) because there is basis to believe that if they've committed an offense more than once, they're more likely to do another time.
Be that as it may, I certainly see the rationale behind "investigating an offense as a hate crime" because this is based upon the assumption that the party responsible will continue to offend unless apprehended, and the offender therefore merits a higher priority than a more casual perpetrator of a similar offense.