Not fully true. I know Palestinians in Canada from Gaza. At least during peaceful times, there is regular traffic between Israel and Gaza for work, travel, and medical care. between Israel and Hamas it's not easy but it does happen.
True background info from La Corriere Della Serra and The BBC confirm this, Gazans were earning a living in Israel. It's the West Bank that was under attack, the raid on Jenin is probably the tipping point.
As for who's collaborating with Hamas, Iran doesn't add up. They've just gotten back their frozen assets, money they need to secure Iraq and prop up Bashar al Assad's worthless ass. They only way we'll no for sure is if Hezbollah launches on the Golan Heights.
So who has motive here? The circumstantial evidence points to Trump's object of worship, Vladimir Putin. He has motive, he wants to conquer Ukraine, he needed a diversion, and he's being helped by his good buddy Mohammed bin Salman. MbS cannot actually make peace with Israel, the Wahhabi will have his head. Also the DOJ should forget about investigating Jared Kushner's gift, those that knew anything about it have already been executed.
The west by openly supporting Israel are also supporting imperialism.