A while back I would have said it was neccessary to defend Muslims from the far-right, whether it was in terms of loss of religious liberty within a country or military interventions by western countries overseas. In practice however, that means defending Islamic Fundamentalism which is clearly wrong.
Islamic fundamentalism does pose a clear threat to secular values in the west as well as the rights of women, atheists and the LGBT community, all of whom are traditionally groups whose rights have been defended by the left. An Islamic reformation is the best outcome with promoting liberal and progressive views, but it is also clearly an assertion of cultural imperialism and the supremacy of western values based on the enlightenment.
As someone on the far left, there is an enourmous tension between the secular-enlightenment side of my thinking and the anti-imperialist and anti-fascist one. However, it is neccessary to meet the violence of Islamic fundamentalists with violence, if only in self-defence.
I'm still very uncertian where this leaves me, but I felt it was worth adding "something" in response to your post.
It would clearly be better to live up to the ideals of liberty in the constitution but it simultaneously requires cultural values that uphold secularism. Im unsure what comes first: personal liberty for Islamists, or forcing secularism as a cultural value. This seems to be my dilemma but it is essentially one shared by progressives of all political shades as something that goes beyond "normal" partisan politics to the core of the enlightenment principles from which liberal secular institutions originated.