I have to say that the argument of “they’re only home-made rockets which mostly miss their targets” is rather dull. If I make thousands of home-made bullets and fire them at you, even if most of them miss you, I am still initiating force.
Hamas, who rule Gaza, make their intent towards Jews very clear - they want a Judenrein Palestine to replace Israel, and Iran, who we all know is not an innocent bystander, continually funds Hamas as well as their proxy Hezbollah. The Shia Iranians use Hamas and Hezbollah as Shia organisations in a sea of mostly Sunni Muslims (and pesky Jews) to spread Iranian influence. It should come as no surprise that Iran wish to increase funding to their proxies and smuggle more advanced weaponry into Gaza. We’ve already seen Katyusha and Grad rockets, which are more powerful than Qassams. Even with the Qassams, people speak of them being “home-made” like they don’t kill you if they land on your house. They do. Just last month one was fired at a school bus and a 16 year old boy was killed. Aside from costing millions of dollars worth of damage, these rockets, all 9,000 fired since 2000, with a dramatic increase when Hamas took control of Gaza after Israel withdrew all troops and settlers, cause profound psychological damage. I believe that a majority of the population of Sderot, which is in the main firing line, have some form of post traumatic stress disorder and many have fled the town. It’s not as if these things don’t do damage.