The left uses any group it finds for political support thinking that when they win, they will find a way to command their supporters. The Muslims are smarter and better armed then the left realizes and they will wind up in charge if the left has their way. (There is not a clearer example of a death wish then liberals joining ranks with radical Islam.)
Holland has a choice, but neither choice is very attractive. (1) Give in to the Muslims, let them establish a Muslim run state and move or convert to Islam or (2) Stand up to the Muslims, demand they conform or be deported, and face an insurgency similar to the one in Iraq. Islam is basically in charge of the choices, but Holland gets to choose one. Interesting indeed is the fact that all the people would be better off with choice (2), but Holland is very tolerant and (1) would fit more in line with their idea of social experimentation.
Pragmatism isn't always attractive, but it has the advantage of cutting through doctrine, getting to the heart of a matter, and worrying about political consequences later.
In Holland's case survival demands pragmatism.