They freak out when their dogma is questioned. Typical.
Christian zealots do the same. Muslims on EP have been sarcastic with me, sometimes very rude (especially men), but they don't block so much.
no, that's when we decide the other person isn't worth the effort.
Sarcasm, like any form of humour can be more or else cruel, more or less caring. Anyway, the worst is not sarcam, it's the insults and the threats.