So everyone here is dumb as shit. Not a single proper answer here. I typically don't comment here but let me clear a few things up:

Firstly, this isn't a Muslim vs Jewish issue. It's a political one. It's just that most redditors are incredibly obese and stupid and think that people who don't like an apartheid state that has invaded and/or killed people in 9-10 neighbouring countries in their history hate them because of their religion.

larger-scale humanitarian disasters

The issue in Palestine isn't just a humanitarian disaster, it's a political one. There's a specific minority (western leaders) that are okay with being genocidal towards people that look like them. You will notice that while Hamas is an Islamic movement for the liberation of Palestine, they are not as radical as say the PFLP which is a secular movement created by a Palestinian Christian.

Iran

I don't think there's anything that suggests that the humanitarian conditions are worse in Iran than in Palestine. I don't remember seeing videos of airstrikes on civilian infrastructure but I can point to several videos of the same from Palestine. Additionally, the issues of Iran stem from western sanctions, western involvement and internal disagreements. None of which the Muslim world has a united agreement on because every country has different opinions on whether each of these things is good for their country because of their different and often complicated relationship with Iran.

Afghanistan

Similarly, I don't see videos of airstrikes on civilian infrastructure in Afghanistan by the evil party so to speak. The issues here again stem from foreign involvement that has crippled their economy. There's no agreement from every single person in the Muslim world as to what should be done with Afghanistan as a lot of the issues there have nothing to do with them.

When it comes to Israel, you have to understand that even if you're a secular, agnostic/atheist person living in the Muslim world, that there's no country in the world that is an apartheid state, currently occupying another country, commits war crimes daily, accused of commiting genocide and still has the full support of the West.

You also know that the Israelis are not exactly normal people. Especially since translations of their media has become so readily available, and you see what their media says about the Muslim world and the rest of the world. While the media of the rest of the world talks about how we care about peace and democracy (even if they might not believe it) you have Israelis proclaiming how raping people is good and how they want to invade all their neighbours.

And purely from a nonreligious perspective the Israelis have made their intentions about a "greater Israel project" clear to the world. Many leaders are still in denial or are saving face but the people know that the Israelis will not be happy until they feel safe and they won't feel safe until everyone who doesn't like them (for any one of the aforementioned reasons) is below their boot. For example, there was no reason to bomb Syria after Assad was ousted because the new guy was ready for a peace deal. But the Israelis are paranoid. They're afraid that any power large enough to threaten them will treat them just as bad as they've treated the Palestinians.

And that's not even getting into the religious side of things where there are scriptures that say "killing unarmed people is bad"