Starting a war and losing does in fact arguably justify annexation. Distance from those trying to murder you provides safety and security.
Peacefully living with Jews seems to have worked out pretty well for the Arabic 21% of Israel who stayed and currently enjoy full citizenship rights, it's a shame those who left chose violence and continue to choose violence.
The only side that has committed genocide in this conflict or that to this day advocates for genocide in this conflict is the Palestinian side. I oppose genocide, which is why I stand with Israel.