Yes, I tend to agree that the word “culture” is nebulous. I don't think there is anything inherent in the word “cultural” that targets any specific culture. If people want to be offended, they're going to find a way to be offended, let's face it.
What I find interesting is that with regard to the issue of polygamy in Canada, if you look at the one case that went forward in the criminal context, it was not talking about Muslims. It was dealing with Mormons, American Mormons. That's their cultural group. It's not specifically targeting any one group.
Again, I'm not a fan of hyperbolic language to start with, but I find nothing about the particular language here that's any more offensive than anything else in terms of a short title.