Last time i checked betting is not a sin in Christianity. There is no bible verse with reasons why betting will be a sin.
I respect your religion but sooner the narrative of betting in Muslim needs to be changed with good reasons. There must be a good reason why you Muslim see it as haram, which i would like to know if you don't mind.

If it is the behavior or attitude of those that gamble that makes it a sin, then you need to know not everyone behaves the same way. There will always be persons who will abuse gambling while others are maintaining the rules of gambling responsibly.