So how many more Americans would have had to die at his hands, for you to consider taking him out to be proportional?
You probably didn't know that Soleimani had been designated as a terrorist by the US government, so in reality, he was treated exactly the same as any other high value terrorist target.
Your point regarding the difference between terrorist groups like ISIS and nation states like Iran is interesting, but imo is completely outdated. Even before 9/11, but definitely since, it weakens the US to consider only nation states to be credible threats to our national security.
If you really think the "executive agreement" that president Obama entered into (notice I didn't say treaty, because it was not a treaty) would have slowed Iran's nuclear program down for even an instant, I think you're naive at best. Plus, it gave back all the funds that had been frozen for years. While it wasn't giving away taxpayer money to Iran, the net effect was the same as giving them money, imo.
I am glad to see that you agree Trump's actions at the embassy were legitimate. It just goes to show that even people who generally disagree, can on rare occasions find some common ground.