I would support allowing 8-10,000 Muslim immigrants into the country every year. The reason is that we let in 1 million immigrants per year. Muslims are now only .8% of the population. If we let in 8,000 Muslims per year, then the Muslim population will not grow, as we are only letting in Muslims as a precise percentage of their already existing population.
The main issue with Muslims in my opinion is to not increase the population in the US. In other words, going from .8% Muslims to 2% Muslims would be a bad idea. Going from .8% Muslims to 5% Muslims would be much more of a problem along the lines of what a number of West European countries are experiencing now. If the Muslim population stays at .8%, then letting 10,000 Muslim in a year will not budge that figure one bit. They will remain ~1% forever at that rate.
On the other hand, their population could grow due to a high birth rate. But once again, the issue with Muslim immigration is that Muslim immigration in and of itself should not increase the % of the population that is Muslim in the US. As long as Muslim immigration is low enough that it is not increasing the Muslim population as as % of the whole, then Muslim immigration is not a problem.