To quote Saleh from the crosspost:

Fascist leaders need a constant threat to justify their leadership. If Israel cannot continue to escalate and create the image of being at threat, it also will cast doubt on the support they received and receive and it will make people speak up more about their crimes.

To appear as the perpetual victim, you need perpetual violence, so you need to perpetually attack other people.

Also Israel has the vision of a “Greater Israel” empire spanning from Egypt to Saudia Arabia to Turkiye and Iraq. Not only will this require the ethnic cleansing and genocide of hundreds od millions of people in the region, but also it will need to be filled with more non-Jewish white settlers, for instance US Evangelicals, as Israel doesn’t have nearly enough population to maintain such an empire.

Adding to what the other guy said, Syria really doesn’t wanna get into a war right now. They still haven’t unified the armed factions or rebuilt the economy or really gotten themselves in any shape to go to war with Israel, and Israel knows that. They’re doing this to weaken the Syrian government and, hopefully, push the country back into civil war.