What are the odds. What a coincidence.
The problem isn’t in that you believe in such God only, it is also in the fact that you’re willing to do anything just to avoid the eternal wrath of that one true God. To think that this is the only way you can achieve morality is to doubt your ability to adhere to such morality even if enforced upon you by the one and only all-knowing, almighty, and all-powerful creator of the universe.
A major part of the problem is the fact that many religious believers think that it is impossible to stay moral without some form of adherence to one religion or the other.