Perhaps we know, but the reasons will be unpopular.
US isn’t arming or funding or enabling Iran directly, so calls for US action would mean call to war, which US leadership has already been signaling.
Maybe you think US should go to war. Regardless that’s the biggest difference.
There are also frankly many who are confused about Iran - sympathizing with Iran leadership as enemies of IDF and not understanding who they are and what they do. Lack of video going around doesn’t help.