Nobody is telling Christian swimmers that they shalt not honor their mothers and fathers. It is impossible for a believer not to obey the tenets of his or her religion at all times, but that's different from practices religious services or rituals on gov't property.
So you think that, for the price of rental, there can be places IN THIS COUNTRY where Sharia Law rules?
Talk about 30 pieces of silver!
So how do we know what Muslims do as they swim? Are they praying while doing the backstroke? Doing that weird yodel thing? Bowing to Mecca?
The Christians were honest enough to say what they would be doing in the pool. Do you know what rituals Muslims practice re. immersing themselves in water? Would they be told they can't pray while using that facility?
Somehow, I don't think so.