This is a reasonable answer, though I might quibble about whether the harm done by UUs is based on UU beliefs or whether it's a general cultural failing. What do you have on the Discordians? (I know that some Discordians are assholes but I'm unaware of any harm done as a group, since they don't tend to form groups.)

I don't think any religion contains only good people or that good people can't do harm. I just doubt that there are _no_ religions that are harmless.