I feel like we're just in a circular argument here because the message of the image is not just a statement of fact, it's implying that, despite protesting, that those three women or whomever Torraine was talking, were still in some way responsible for letting Trump women. They're offended because they're being implicated as the enemy for doing nothing at all. Again, if someone were to post a "53% of White Women voted Trump" thread none of this discussion would be had. Torraine even used the term "Why 53% of you," which, if that isn't clearly saying "you had some part in this," then I don't know what is. People are mad because they imply that it does apply to them and/or their family, not because of the fact itself.
As for the people saying "This is why Trump won," they aren't saying "People will vote for Trump specifically because of this," they are looking at the hard truth that, if we don't unite as a whole, the left will not get the supporters it needs from the moderate and disenfranchised to ever have a chance of winning. I'm a Brit and this is exactly what's happened with our liberal Labour party; an "all or nothing" sector has pushed away the more moderate sector (and vice-versa) leading to total uselessness as people are more focused on infighting than anything else. The fact is that, if the left is to be seen as strong, we don't need this type of criticism at all; fight the actual enemy that's visible and clear, not leftist Clinton supporters that happen to be white. The only goal right now is making sure Trump loses some power in 2018, and all of it in 2020; there is literally no other way things can change as without political backing minorities only have themselves and legally powerless allies to support them.