I believe (I have no proof, of course) that although other
Gods might be jealous Gods and hate their worshippers also worshipping other Gods, His Noodlyness is a generous God and really doesn't mind what His followers believe just so long as they don't try to claim that there is any scientific proof.
I cannot promise that liking the FSM will go down well with a jealous God, though.
You might just have to tell such a God to get over himself already!
P.S. My God used to be very
jealous; he encouraged His people to be nasty to non-believers and smote people regularly. But he's been sulking for a couple of millenia after His Son told everyone to start being nice to each other instead.