Amanda Palmer and Horizontal Fighting

This entry is not about WWOOFing, per se, but about what I was thinking today as I raked up the freshly weed-whacked grass.
Derrick Jensen and Lierre Keith call it "Horizontal Fighting".
The term "Horizontal Fighting" means that members of the same community, who (theoretically) have the same goals, bicker amongst themselves instead of working together against their much larger foes.
When Derrick and Lierre used it, they were referring to matters of environmental justice.
But what brought this up for me today is something I heard about Amanda Palmer, a brilliant and empowering musician who has done a lot of work to counter prejudice against certain demographics. Her work includes an album called Evelyn Evelyn, which she wrote with her husband. They perform as conjoined identical twins, telling their story through songs and narration. Their performance is at once hilarious and tragic.
I later found out that Amanda Palmer had been publicly criticized for being insensitive to the struggles of conjoined twins, and that her album was "offensive".
In the same vein, I recently read an article about a trans girl who had won prom queen at her school. The author of the article, who is clearly delighted at this success for trans people, was heavily berated for calling his subject "Andrew" when the girl apparently goes by "Andy" at school. His response to these comments was that he had in fact interviewed the girl, and that she had asked him to call her "Andrew" in the article.
What I'm trying to get at here is that there are far more prejudiced people in this world than AMANDA PALMER and this journalist. Though I haven't researched it extensively, I doubt that any actual conjoined twins were offended by Evelyn Evelyn, if they even knew about it. I think the comments made against these people were made by members of the die-hard PC brigade, just looking for an excuse to be offended and self-righteous and show how unprejudiced they are, in a very Salem Witch Trials kind of way.
I think it's ridiculous, considering there are probably conjoined twins being exploited now and there are definitely trans people being beaten and murdered.
Why go after people who clearly do not need any coaching in respect and acceptance, instead of those who are ignorant and actively prejudiced?
Unite, and go after your real foes, or you rot your cause's efforts from the inside.