I disagree.
The post was seething with hate and bitterness.
And the "point," if there really is one, is completely irrelevent to this topic.
IMHO, of course.
I agree that the line about proseletyzing barf alert was pretty rough.
But look at it this way. If Judaism was a proseletyzing religion, which it's not, there would be evangelical Jews saving Christain souls by converting them to the "true faith" of Judaism. I can imagine that a thread celebrating a Christian who had seen the light and become Jewish might upset a few of the evangelical Christians on this forum.
But I admit, I can't see into the mind of the guy, I'm just saying that his reaction is something that would be understandable for many Jews, rather than an indication of hatred toward Christianity.