The primary reason that they tend to despise Tuttle-Singer is out of a sense that she gives far too much credence to the "Palestinian Narrative" and not nearly so much credence to the Jewish experience in that part of the world under thirteen centuries of Arab-Muslim imperial rule. She also generally gives equal moral justification to Palestinian-Arab hostility toward Jews as to Jewish measures of self-defense. Her writings suggest a moral equivalency between Jewish defenders and Arab aggressors. I would not put her on the same low level of, say, Gideon Levy or Amira Hass of Ha'aretz
However, she does not emphasize that the Jewish people in her part of the world live under siege, despite the fact that she lives in Jerusalem with her own children. She acknowledges it but is more concerned with Jewish wrong-doing than the never-ending Arab assault on the Jewish people.
I covered a bit of this in my previous piece wherein I suggested to Tuttle-Singer:
History as a field of knowledge resides at the crux of the Humanities and the Social Sciences and is, thus by necessity, interpretive.Nonetheless, Tuttle-Singer seems to be among those political writers who believe that the "Palestinian Narrative" of Never-Ending Victimhood needs to be given equal consideration to actual Jewish history in consideration of the conflict.
This is why there is always a significant element of subjectivity within even the most scrupulously professional historical narratives. Nonetheless, for a narrative to be a historical narrative it must be grounded in something that closely resembles the truth of the past.
We do not simply get to make up our own “narratives” as the Palestinian-Arab leadership has done, and then insist that ahistorical nonsense be taken seriously.
She also believes that the Jews of the Middle East are "Occupying," with "the Big O," the very land of Jewish heritage and tends to be sympathetic toward Arab-Muslim push-back against Jewish self-determination and self-defense. She thus often harps on what she sees as Jewish opression toward others, while generally giving the Arabs a pass. Much of this was previously discussed in a thoughtful January 7, 2018, piece by Paula Stern entitled, The Truth According to Sarah Tuttle-Singer.
But, again, I like Sarah Tuttle-Singer. I have a great deal of sympathy for any public figure who must face malice and hatred in the cause of dearly held beliefs.
Speaking for myself, I can only aspire to earn such hatred.