But these types of comments that are clearly inflammatory, are about religion, and about a religion many practice on this site (not that that really matters) really can't be allowed on the site. It appears he's done it before, but another warning is probably appropriate in this case
It would be one thing if he just left it as a post from a month ago or whatever. It'd be another thing if he said get over it, it'd be another thing still if he didn't respond. But he did respond and did so in an inflammatory way.