Do people in the West target Islam in ways that they don't attack other religions?

One complaint that I've come across a fair bit from Muslims over the past years is that people attack Islam in ways in which they wouldn't target other faiths. I disagree, and I'm wondering if perhaps a couple of articles published over the weekend might clarify this. Nicholas Kristof's NYT article Exploiting the Prophet had a fairly similar tone, but I think that the Wall Street Journal article Muslims, Mormons and Liberals: Why is it OK to mock one religion but not another? was first:

... if you can afford to shell out several hundred bucks for a seat, then you can watch a Mormon missionary get his holy book stuffed—well, I can't tell you about that, either. Let's just say it has New York City audiences roaring with laughter. The "Book of Mormon"—a performance of which Hillary Clinton attended last year, without registering a complaint—comes to mind as the administration falls over itself denouncing "Innocence of Muslims." This is a film that may or may not exist; whose makers are likely not who they say they are; whose actors claim to have known neither the plot nor purpose of the film; and which has never been seen by any member of the public except as a video clip on the Internet.

So the US Secretary of State attended a play mocking Mormons and, previously, Piss Christ was put together with government funding. (To be fair, It seems as though various threats were made about that "art" as well). It seems though that it's recently been put back on display under heavier than normal security. As far as I know there's been no request for removal made by the White House such as was made (and rejected by Google) over the Innocence of Muslims film.

I'm not a fan of the movement to get the UN to pass a resolution against "defaming religion" as in practice this sort of thing seems to lead to a fair bit of oppression. (Ironically this movement for a resolution against "defaming religion" seems to be led by countries with poor treatment of religious minorities). I was a little surprised though that Canada still has a law against blasphemy in place, though not enforced for quite some time:

... Canada still has a law against blasphemous libel in the Criminal Code – section 296 – though no one has been prosecuted under it since 1936. ... There were five attempts to enforce that law in Canadian history. This law deserves a cozy retirement in a nice museum. That would make it easier for Canada to speak out against the archaic blasphemy laws in other countries.