Iranians and/or their proxies attacked the USS Cole and killed about 17 sailors. Attacked the Marine barracks in Beirut and the embassy (and French embassy), killing 241 Marines, about 17 at the embassy, and dozes of French soldiers and staffers. Don’t forget their attacks on our troops in Iraq, esp. with IEDs. Maybe even got to Afghanistan to work with the Taliban and even more likely to have worked with the Pakistanis.
Behind the deadly bombing of a synagogue in Argentina about 15 years ago that killed almost a hundred people. Behind attacks in Israel, Jordan, Yemen we know about, possibly Al Qaeda in the Sinai, Libya, and possibly Egypt, among others.
Attack by proxy is still a war against the US.
The Iranian web of subversion, terrorism and murder is far and wide reaching. To ignore it, like a fly, is to invite assured death and destruction.
The Talibs hated the Shia and killed them.