You’re right that interrupting shipping along this route would be much harder than closing the Suez, but the U.S. still has carriers and submarines, so it could act alone without any of those nearby countries you mentioned.
In my mind, the big shift here is (1) cost and (2) forcing a longer route now means you have to shoot at boats, you can’t just refuse them entry to a canal. It would mean a much larger escalation.
There are a lot more lurkers on any forum than active members who comment. Everyone here has read a thousand more posts/comments than they’ve made. Getting lurkers to consider what you say is a very real thing, and people do change their political beliefs based on what they read online.