As for the argument of could we have warned them? The U.S. built the bomb and didn't even fully comprehend the power it had until after they dropped them.
Oh bull. We didn't know the bombs power? We knew damn well that it was going to level an entire city and kill thousands of people. Don't even try to tell me that we "didn't know that"

Showing Russia that we were more powerful than them was also a contributing factor, as was keeping Japan out of Russian hands. Doesn't mean every other factor is eradicated.
Where did I say this?