Neither of the mentioned religions fixates solely on "believing in a man in the clouds." You're purposefully reducing the spiritual and prose content of these multifaceted, vibrant families of traditions. The person you're replying to isn't suggesting these religions don't believe in omniscient deities, they're trying to discuss them beyond the juvenile, r/atheist flat "le epic sky man" level of discourse.
Actually they literally do fixate on belief. In fact, the primacy of belief repeatedly and explicitly stated in their respective holy texts. And we’re not just talking about belief in some abstract feel good concept when it comes to Christianity and Islam specifically, but rather in the existence of actual physical miracles that happened to real people. The rejection of these purportedly real supernatural events is to reject the very foundation of these religions in particular.
Belief is so central to these religions in particular that there are multiple treatises arguing over the fate of good people that who do not share their belief, and whether mere ignorance (as opposed to conscious rejection) is enough for them to be “saved” from eternal damnation. To deny this, is either displaying ignorance or is rather disingenuous attempt to shift the discussion to abstract platitudes. Furthermore, the omniscience, omnipresence, and omnipotence of their preeminent supernatural being are fundamental properties of it.
Using big words, and acting serious, doesn’t hide the fact that the very topic is unserious. It’s like holding a conference on the economy of the United Federation of Planets. Sure, it may be a fun intellectual exercise, but no matter how much you dress it up, the core concept is fiction. And treating it as serious is not only unproductive, it’s profoundly insulting.
But sure. The Emperor’s new clothes sure are fantastic, and anyone saying they don’t exist are just haters.
