the "accusation" of genocide against Israel has been rejected by every key member of the UN as baseless and without merit or evidence.
Well, Israel's allies (France, Germany, Hungary, Austria, U.S., and U.K., by my count) have objected, and most of the other Western nations have declined to take a stance. Meanwhile, more than 25 nations in the Middle East, Africa, and South America support the case. So, if you think that this case is meritless because, “key,” U.N. members don't support it, your ignoring massive international outcry and showing off your Eurocentric bias.
The only thing stopping those missiles from hitting Israeli civilians was the American Iron Dome missile defense system
the United States, who have, thanks to Iron Dome, protected the lives of countless innocent Israelis
Yeah, this is just wrong. It's not American, it's Israeli. We've contributed money and missiles to it, but it was designed and built by an Israeli defense firm and the IDF. Americans want to believe that Israel would be helpless without them, but Israel has a first-world economy and a very well-funded military. This isn't Ukraine; there would economic and political consequences for Netanyahu if Israel lost our support, but they don't need our support to survive. Biden could withdraw support to Israel due to human rights violations without creating an existential threat to Isreal.
We don't get to simply refine words until they mean what we want them to mean.
You're right, so let's look at the U.N.’s legal definition of genocide:
Killing members of the group (check); Causing serious bodily or mental harm to members of the group (check); Deliberately inflicting on the group conditions of life calculated to bring about its physical destruction in whole or in part (check); Imposing measures intended to prevent births within the group (check); Forcibly transferring children of the group to another group (...nope, not that one).
Any of these constitute genocide, and Israel is at 4 out of 5.
Finally, you seem very concerned with what could happen while ignoring what is happening. Yes, Hezbollah and Hamas could commit genocide against Israelis with enough support and resources. Yes, Israel could have much higher civilians casualties without the Iron Dome (which, again, is an Israeli creation). If these things happened, there should be international outcry and U.S. intervention. But Hezbollah and Hamas can't win a war against Israel, much less commit genocide, and Israel does have the Iron Dome.
But what is happening is that Israel is waging a campaign of destruction that has killed at least 1% of the population of Gaza. At a bare minimum, 64% of those casualties, 16,000 people, were civilians, and most of them were women and children. Their actions have been described as collective punishment and ethnic cleansing by human rights groups, and there is a genocide case against them before the ICJ.
These are not hypotheticals; this is what is happening right now. And they are happening with the support of the U.S. and, “one of the most, if not the most, progressive President we've had in modern history.”