Today, none. But what appalls us will be be accepted by our grandchildren, if we allow it. And so far we are allowing it. Think of Christian bakeries being forced to bake gay-themed cakes, etc.
I'm not saying Sharia will happen here. But I'm saying it very well can happen here - over time - if we're not vigilant.
As a side note, it's already happening in Canada. Some swim meets at public schools are being segregated by gender, just because a few Muslims have complained.
Grandkids are the most susceptible to liberalism, expanding government controls, political correctness @nd Islamism with all its evils because of the programming they are getting in public schools and at the college level. We have worked with our kids, married now with their own. And, they are leading our grandkids in the path they should follow. But, what about th generation after that?