So many mistakes that are made by individuals of all types are simply because they did not consider the effects of their actions on other people and then themselves.
In the grand scope and scale of the universe, you can truly seem small. But being able to be a part of someone or something else, you HAVE made an impact on the universe.
Asking "What if god is real and he hates you because you denied his existence?" is the same as asking "What if the speghetti monster is real and hates you because you denied his existence?". Any noun can be put in place of god in the statement, making it a logical fallacy.
If god can create a rock he cannot lift, he is weak for not being able to lift any rock, if god can't create a rock he cannot lift, he is weak for not being able to create such a rock.
Morality is a lot like currency, man gives it value as a whole. If we were taught morality by religion, then what taught religion morality? If it was god, who taught god morality?