The Iron Dome’s weakness has been demonstrated by Hamas. Just lob enough trash at it to overwhelm it. But firing a ton of low-cost projectiles means they won’t be accurate whatsoever.
Iran hit an israeli airbase with their missiles in April even with all the advance warnings so it’s likely they could bypass the Iron Dome.
At this point israel is on a mission to get America expelled out of every country in the Middle East.
If the US needed a foothold they would make israel accept a two state solution with the Palestinians.
Bibi flying in to order Congress around is also not exactly what I would call a show of force.
At some point people have to ask why the tail is wagging the dog.