If you don't want to discuss the behavior and morality of the IDF, nobody will force you to steelman them. But some of us would like to call that into question, and dismissing our conversation with "that's immature" is a thought-terminating cliche.
As for your line about people not knowing the history -- partially fair enough. Though that's also a propaganda line spread by Israel to keep people out of the metaphoric town hall. If you really believe that to join a movement you must first learn the entire history of all concerned parties first, shouldn't the same apply to any comments about Israel, or the US? I don't see pro-genocide commenters being told to shut up because they don't know the completely history of the Ottoman Empire.
- Israel Palestine. - India Pakistan. - Apartheid in South Africa. - .. anything else?