This is factually incorrect.
1) Israel didn't attack a sovereign country's embassy. They attacked an annex. Notice how everyone killed was IRGC and the ambassador and embassy staff were safe. A lot of news sources got this wrong, and this has become one of those nuances that got lost for those who aren't reading and tracking this carefully.
2) Let us not forget that Iran set this precedent long ago with this - https://www.reuters.com/world/argentina-court-blames-iran-deadly-1994-bombing-jewish-center-2024-04-12/
Can we agree on this much?
3) Your take on Gaza is also weird and incongruent. Let's do a simple exercise. You claim Israel is an occupier. As an occupier, Israel is obligated to provide food, water, and shelter to the occupied territories, which it did before Hamas and MANY Gazan civilians went on their adventure into israel.
However, as an occupier, Israel has some flexibilities, which include setting up checkpoints, restricting population movement, and really anything for the purpose of security. Palestinians have shown time and time again that they are a true security threat. So if Israel is really an occupier, their behavior in Gaza and WB is really justified. Think another way. If there was a terror group that actively lobbed missiles from Puerto Rico and Guam into the continental US, you can bet your portfolio US would not hesitate to deal harshly and there are many existing laws that could be applied to punish those responsible. This is why I think the talking point of "Israel is an occupier" is a really bad one so whoever is giving you your talking points, should take that into account.
4) You want to see real Genocide? Look at how Hamas went into Kibutzes and systemically targetted and killed every family they could find. That's what genocide looks like. If Israel had no ability to stop Hamas, they would go as far as they could. That's Genocide. What Israel is doing is combat. Terrible collateral damage (still well below many comparable urban warfare situations) but it's legal combat. I'll concede that not everything Israel is doing is perfect and by the book but it's much closer to what International laws were designed for.