Earlier you said that it's pretty obvious that rejecting god is a sin, but that's only the case because god supposedly says so.
Given that God is omniscient and omnipotent, it follows that anything God knows to be true is true.
Then he gives us free will so we can decide what we do on our own and wants us to love him and says that not loving him is a sin. Does this not strike you as even a little wrong?
Not in particular. Consider it like a marriage. God is often described as a "jealous God," because he is being compared to a spouse. A marriage is based on love, and love must be freely given, hence free will. Nonetheless, it's fairly obvious that a husband would not be particularly happy if his wife was being unfaithful. We are given countless opportunities in our lifetime to reconcile, "graces", if you will. Love and marriage is a two way street after all.
"You can decide what you want to do, but if you decide other than what I tell you to, you will suffer eternal torture, and it's none of my fault because you have free will."
How's about this one? "You can do what you want, and if you decide to do other than what I, the Lord and creator of the Universe, tell you to do, I will extend my love so far as to become a man and die a horrible death for your sake. I will do this as an act of love, but love cannot be forced. I give it freely, but you must accept it freely. If you do not, then there is no love, and you cannot enter the Kingdom of Heaven, for the Kingdom of Heaven is built on the foundation of love."
He can supposedly bend the laws of nature any way he wants, so where's the problem in creating a mountain range spelling out the words "GOD WAS HERE!" for everyone to see?
His existence is obvious to billions of people around the world. He did create a mountain range. He created the earth! He didn't need to spell out the words, "God was here!" he came here in the flesh!
Beyond that, I've discussed the existence of God in plenty of threads and in a far greater number of words than I care to paraphrase here... so.
If you're happy with that, fine, but you do see why others might not be prepared to worship or even just believe in a god, don't you?
I actually generally fail to understand why people wouldn't worship God, assuming He exists. He created you. If you follow Christian theology he suffered for you. Seems worthy enough of praise for me.