Here in the US, they may want to first stop and consider the very strong possibility that people are responding to them being an insufferable dick rather than their lack of belief.
If it is suspected that illegal discrimination has actually occurred, they should confer with legal counsel and determine if seeking redress through the courts is worth pursuing.
If it is suspected that illegal discrimination has actually occurred, they should confer with legal counsel and determine if seeking redress through the courts is worth pursuing.