Again, we can test your theory out. We know the leftists will prolapse if Christians voluntarily gather (whenever two or more of you gather in My name Matthew 18:20). Your theory is the right would prolapse if similar prayers came from unlikely sources. So, I say we test this out. There are Muslims that work there, have it led by Ilhan Omar (as you suggested) get them to come out and pray to support our troops, and to keep them safe... Let's gauge the reaction. See who gets upset over it. Other than militant Atheists who think anyone talking about God in public is against the "Establishment Clause" my guess is only leftists will care that people are praying.
It doesn't violate the establishment clause, it is outside of work hours and voluntary. We've already gone over this and the SCOTUS ruling.