Reading through some of the posts, one has to wonder if the roots of certain issues stem from a difference in preceptions and priorities.
e.g. A fixation on superficial beauty and/or material possessions as a focus, rather than the substance of the character of the individuals, (what rests beneath the shell, traits often hinted at in context clues. This works across the spectrum of traits, the good, the bad, the neutral, and the ugly.)
If one speaks out about the focus of the superficial, it is very easy to label the dissenter(s) as horrible, jealous, or mean. (No one is saying there aren't dreadful people out there because there are, that is a known fact. However, it is a very subjective topic.) It is neither reasonable nor fair, it speaks to an almost childish emotional reaction, (or possibly Rejection Sensitivity Dysphoria). (Sally didn't agree with me, so Sally is a horrible person.) If you've ever heard an angry toddler yell, 'Mommy, you're mean,' simply because mom set a reasonable boundary.
The focus on the superficial is a key component. It is what gives one the first instinctive reactions, but as interactions progress that first impression is either reworked or reinforced. (Dislike, neutral, like).
Is it unreasonable to limit interaction with those whose focus is totally at odds with one's own ideas? Being civil is easy enough, but unless there is a reciprocated reason for offering more (family connections, good friends, intellectual discussion, etc...) why should one have to? Basic civility, doesn't require much in terms of effort, yet some folks can preceive social neutral as dislike. e.g. Something as simple as not laughing at a joke that one doesn't find funny.
It is the difference between taking an active role in life and being a spectator. As children, folks, (unfortunately in some cases), don't have that kind of autonomy, as adults it becomes the individual's responsibility.
To pull from children's literature archetypes. Being more Alice, (Alice in Wonderland, Carroll), defy like Ella, (Ella Enchanted, Levine), and getting to know the dragon like Cimerone, (Enchanted Forest Chronicles, Wrede).
Or look to the tale of King Thrushbeard (Brothers Grimm) and the lesson of the Expectation of Exultation, (the innate belief that one is entitled to pandering attention and adulation simply because of one's appearance and/or social position.)