If there is a god, religion, a book or another person is not required to see it.
If there is a god, I would suggest that that which is external is a hindrance to seeing it at all for for one to see it, the relationship would have to be between god and the individual with no intermediary.
this is correct.
Then you would assume such God does not want you to cooperate with the rest of humankkind
Cooperation between humans has nothing to do with Gods as I see it. Cooperation can go on with or without a God. And a God would exist even if no one believed.
Anything human-related is God related. You, yourself, said it was all inside or something like that.
no, not really. the connection is personal, that's different.
it does not assume that. it assumes you look inward for guidance, rather than consulting the blind.