Apparently it's now perfectly fine in the West to belittle Christians and Christianity in general, but not other religions. Why is that?

An example of what I mean can be found right here on GAG. Unfortunately I cannot link, because I get the message that I "have to be Xper level 3" to do so, but it's under the topic of sexual behaviour, and it asks the absolutely disgusting and disturbing question as to whether or not you would have "given Jesus a 'happy ending' while he was on the cross". Why is this crap tolerated? Is it just hypocrisy, just yet another example of the many blatant double-standards that now plague Western society?
Apparently it's now perfectly fine in the West to belittle Christians and Christianity in general, but not other religions. Why is that?
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