They thought they were open to it but do you seriously think they would have integrated well into the West? Agreeing on Syria, Afghanistan, Irak, Africa, Pakistan, China? Agreeing to the US’s terms like Europe did post 1945? There’s no way in hell. It was always intended to end like this. 

They built their entire world around antagnizing the enemy, and so did we. They felt humiliated by the 1990s and by the subsequent aftermath of former Soviet satellites joining the superior West. There was always only one way out : total defeat by the US. Crushed like Germany and Japan and forced to abide by the US’s rules. I’m not saying I wish that was the case, but that was the only way for it to be peaceful