Massacres committed by the IDF, Etzel, and Lehi in Arabs and the attitude towards historical research

Hello and welcome, I was recently exposed to information following massacres committed by the IDF, Etzel and Lehi in Arabs and they were less few than I thought, there were at least 24 such incidents in the War of Independence (including Deir Yassin which was carried out by the Etzel and Lehi), then there was the Kibia and Kafr Qassem massacres which were carried out in the 1950s (under the command of Arik Sharon and were maliciously concealed by Ben Gurion who knowingly lied to the public and the world that the IDF did not do it). Even exemplary figures like Meir Har Zion, following the murder of his sister by Bedouins, simply went with his friends and murdered 5 random Bedouins in the area as blood revenge, all this information has quite shaken my beautiful image as if Zionism was a tallit covered in all blue. One of the great and honest historians who deals with these fields and exposed many of the massacres committed in 1948 is called Professor Benny Morris and he actually defends the Zionist narrative. And I say that in the situation of the War of Independence, what was done may not have been morally correct, but it is not unacceptable. I would love to hear if you have ever touched on the subject and what your opinion is, and if you haven't, then what your opinion is on the path to discovering the truth in historical research (because this world is quite full of agendas and biases). Thank you and all the best.