There can be only one rule of law. I'd like you to consider what might on the surface seem "not dangerous": in the UK there are many Sharia courts that are limited to only family, civil matters. Seems innocuous enough, but the occurrence of violent coercion behind closed doors is high. So a seemingly innocuous "Sharia civil court" is in fact allowing horrible misogyny.
As far as the danger of the far right, I'm with you. But both camps (the far right and Islamists), can be criticized independently.
To put it another way, I've become a centrist and I see most forms of extremism as being dangerous. Far right extremism, far left extremism, Islamism, Oligarchy... all are forms of extremism, and all are dangerous.