Right And Wrong Means God Exists - The Moral Argument

This here is the Moral Argument for God's Existence:

P1: If objective moral values exist, then God exists.
P2: Objective moral values exist.
C: Therefore God exists.

It's a nice straight forward one. It's easy to see that P1+P2=C if they're both true.
So the question is, are P1 and P2 true?

The short answer is yes. But let's look closer anyway.