While the current events are not great, Israel’s border has changed through military engagements where it was on the defensive/being invaded.
Also, while it could be debated they were in the wrong then too, they did take some land as buffer regions because they were being repeatedly attacked.
That was decades ago and not all the situation here. Israel just took land because Syria couldn’t stop them and no one else will either. Also, being invaded doesn’t justify ethnic cleansing anyway.