To analyze how much recent travel ban by Trump's administration could be called 'Muslim' one might look at the whole Muslim world (by population):
Countries in red (whose citizens are banned to travel to U.S. for 120 days by Trump's executive order) all except Libya appear in top 30 above. But occupying quite sparingly positions among other top 24 Muslim countries they don't appear to dominate this chart.
But if instead we switch the focus to U.S., in particular, immigration to U.S. things change. By arranging all countries (not just Muslim ones) by their refuge (and asylum) immigration to United States picture becomes drastically different: by removing 5 countries in red (banned by executive order) mostly Muslim immigration is eliminated from the top 12 positions completely:
Indeed all top five Muslim countries (in green) contributing to immigration are part of the ban. So based on the refuge immigration to U.S. it appears to pertain calling this ban "Muslim".