When did he say they were spreading their beliefs? Didn’t sound like they said anything about religion except that it was a Jesus themed party, and he didn’t even know what that meant, it could have meant a lot of things.

Possibly unpopular opinion by a fellow atheist, but you’re just as bad as a preaching Christian by doing that. Trying to turn others to your belief system, however right it may be, is shitty, homie. Way to ruin a kids party, when you admit yourself you didn’t even know what they meant by Jesus Party. Made an assumption, ruined a kids week. YTA.