Intolerance of others’ views (no matter how ignorant or incoherent they may be) is not simply wrong; in a world where there is no right or wrong, it is worse: it is a sign you are embarrassingly unsophisticated or, possibly, dangerous.
The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.