I think it's pretty much a given that someone who criticizes the DNC stance on Palestine is also opposed to the GOP stance. Why do they need to list out all the other horrific people when they make a critique? You're engaging in whataboutism here.
If someone critiques the GOP for being blatantly racist, do you similarly ask them why they aren't mentioning the KKK directly? No, it's fucking assumed. Stop being a jackass.
I place the blame squarely on booksellers (mostly Amazon) for this. By refusing to have any sort of consistency or transparency about what kinds of cover content will result in authors being "dungeoned" on their platforms, it essentially forces explicit content to have cover imagery and blurbs that obfuscate the content to such a degree that misunderstandings like this can happen.
Words like "sweltering", "sizzling", "swoonworthy" in combination with "romance" are meant to be a clue that there is sex in the writing, but the cover simply can not be obvious about that without risking the book (and the author's entire account) being unlisted without communication or recourse.