That seems a bit harsh, but not far off.
"Through a phenomenon called "dissimilarity cascades," we place greater stress on personal and cultural differences than on similarities"
A prime example of this is in being someone who tries to be politically moderate, agreeing and/or disagreeing with various tenets of both sides of the political spectrum. Rather than making a bond with everyone through a few common threads, you just alienate everyone instead of half of everyone. Right wingers will focus only on those issues with which they disagree, and Left wingers will focus only on those issues on which they disagree. You'll be accused of a lack of principles, or a spine, and hit with any number of No True Scotsman fallacies. Any similarities are taken for granted and ignored. It doesn't matter that, as a moderate, you'd prefer to think for yourself and not toe any particular party line on every subject.
If you're a pro-choice republican, for example, you're pretty much on your own: ostracized from the right for the pro-choice view, and ostracized from the left for being registered republican. If you're a democrat who believes in gun rights or are pro-life, the same applies.