It applies to postings that lack clear content or references to issues, that focus on exaggerated personality characteristics, and that repeat generally known facts for the sole purpose of cementing an impression or fomenting discord.

It is common oppositional behavior on the internet that is weaponized by bots and troll farms.

Your references to faithful flock and sacred cows are common in the broad brush tactics of "hater" posts. These terms imply that those who disagree with content-free hater posting simply have thin skin. It's necessary sometimes to resist incivility in order for better quality conversation to be supported on anonymous platforms.

Generally, I don't refer to others as a hater in a conversation, but they exist.