Only God decides right and wrong
This is an strange question, giving strange results, neither of which are good for theists. Well, to start off, there are two options that I see (please let me know if this is a false dichotomy concerning this question)
God decides what is right and wrong
If God decides what is right and wrong, then that means that for God, there is no right and wrong. The statement, God is good, would become moot. Because if God decides right and wrong, then he himself is above right and wrong. And if someone is above right and wrong, they can’t be either, or neither for that matter.
Right and wrong are independent of God
But, if someone wnats to say that God is good, like mosts theists would, then right and wrong would have to exist independent of what God does. They would probably have existed prior to Him if they existed outside of him, seeing as morals don’t really age.
Just thought I’d throw that out there.
But, for my honest opinion in the matter, I feel that humans are capable of designating right and wrong without God (simply for the fact that our morals have changed drastically, and heaven would look weird with only people from the 20th century up there lol), but the instrument of religion helps keep people in line. People are apt to stray from goodness without the religion whip cracking them now and then. Santa’s watching, right?
I will raise my kids religious, but if they have any questions, I will give them the truth about what I feel, and try not to indoctrinate them any more than extreme atheists or sunday school teachers would.