I think CM's had enough. I'd like to give him a rest and actually advance a position myself.
All rationalizations about what is "logically possible" and "physically impossible" aside, and disregarding all implications thereof for the existence or non-existence of God (as a matter of fact, for the purposes of this argument, I'm going to assume that God DOES exist), I'd like to know why I should worship him.
Because he's clearly not omniscient. Let's assume, for the sake of argument, that God DID have a change of heart sometime around 6 BC and decided to start being nice to humanity and offer them forgiveness for a change. Let's even say that he offered Jesus up as a sacrifice to humanity to show that he was serious.
If God is omniscient, why would he ever have to change anything he did? Why would a new covenant with humanity be necessary?
Furthermore, God is not omnipotent. Like you said, he can't do "logically impossible" things. And he either can't violate free will or swore it off at some point. Perhaps he is the deist's clockmaker god.
Is God "good?" Maybe. It's possible that God gets "better" as humanity gets "better." And as humanity gets better and better at figuring things out, evidence of whatever power God DOES have keeps slipping further and further outward, away from the rapidly-expanding boundaries of human understanding, conveniently beyond available evidence.
Why worship that?
Why kneel, submit, obey, adore, love, and cherish a being who is only able to exist in the same place as only the most outrageously paranoid delusions of terror and grandeur that the human pattern-recognition software can randomly conjure? Would God actually win in a fight against Cthulhu?
Why worship some abstract "God" with an unpalatable mishmash of qualities that bring out the most psychotically self-righteous in people to the point of murder-suicide? If you feel the need to worship, why not worship the thing you actually like, like love or peace or whatever aspect of God it is that makes him worthy of adoration and not spit and molotov cocktails?
I find worship altogether distasteful, myself, unless I'm worshiping something that is actually powerful enough to be worthy of my respect. Or at least something I know exists, like the sun. Cult of Ra? I get that.