Is it reasonable to ask my classmate to stop writing "j-sus loves you" on my posters?

I’m in theatre, and after every production closes, the entire cast signs posters and we each get to take one home. Everyone claims a poster by writing their name above it, so we know whose poster we’re signing and we can personalize the message if we want to. Some people just write their name, some compliment the performance, others write jokes. But this one guy always writes “j-sus loves you” and it makes me uncomfortable. For one thing, I’m Jewish. And for another, I’m gay, and this guy uses his religion as an excuse to be homophobic. I know he’s not trying to upset me or anything; he’s trying to say something nice, but I still don’t like it. Would it be reasonable to ask him to stop? Is there a good way to do so without offending him? I don’t want to make him feel like I don’t like him because of his religion, especially because we still have to work together for another year