I work with and know a lot of Shia (non-Iranian) Muslims and listening to them talk about this assassination I'm convinced that the likelihood of attempted terror attacks against the US has increased significantly. The non-Iranian part is key. Millions of muslims around the world viewed the Iranian theocracy as the only power in the world fighting for Islam. They are devastated.
Sunni Muslims hate the Iranian regime and consider Shia to be heretics
Having said that, I also condemn Iranian regime killing (reportedly) 30000 protesters. So he probably had it coming.
I'm more concerned about what happens to US now, because I think the attack indicates a complete failure and collapse of the legislative branch of the US government.