Muslim life guard??? I wouldn't trust my neck to someone who places no value on life in general.
Wait'll they refuse to perform mouth to mouth on some drunkard who's drowning.
In America you have muslims cab drivers who refuse to transport passengers who have alcohol (say unopened bottles of wine).
In England you have police/bobbies who refuse to guard the Israeli Embassy.
I guess you can work in a public service industry and still pick and choose who you'll serve.
As a former lifeguard, I wouldn't want to risk my neck to save you, either. But I would do my job.