Why? Because the west supports the occupied in one and the occupier in the other? Don't forget the west expected Ukraine to be an occupied state with a gorilla insurgency within a few weeks at the start of the conflict.
Edit: because I am getting the expected hate.
The Palestinians didn't start out as Hamas. The extremism of Hamas was born out of the lack of action from former moderates. People will always become more extreme when they are met with a lack of action. That goes for the left and the right.
So ask yourself if someone came to your house and told you to leave how angry would you be? If you don't understand this look up the actions of the Israeli settlements.