It denies right to exist. It is not “invisibility game”. It has direct goal to erase the state and people in it. Hamas actions directly confirm it. For years it attacked civilian population with the goal of eradicate it. They are openly stating this the same multiple times themselves. They are showing it in their murderous actions and you pretend that it is some kind of “invisibility game”? Just Google “Hamas statements about Israel right to exist”. They want to physically destroy it. Jezus!
Edit: Also, your double standards appalling: you reject Israel legitimacy because 70years ago they used terrorism tactics to get rid of Brits. But you seems totaly OK with Hamas today.