There are Americans who don’t agree. Some don’t because they detest violence of any kind (and shut their eyes to the real world evidently). Some because they are plain blind partisan politics type dumbasses and so oppose this action because it was Trump (hence Republicans) who did it. There are those who are so afraid of war that they are frozen in their footsteps to do anything about the targeting of Americans by militants who follow Soleimani’s direction.
My only worry here is that we, as a nation, don’t finish what we prosecute. As Sean Connery said as Malone in The Untouchables, What are we prepared to do. If they bring a knife to the fight, bring a gun. We need to prepare to go into Tehran if needed to quell any Iranian backlash.