Teaching children to hate, especially dogmatic hate, is disgusting even when one’s stance is morally correct. If a stance is just, then by teaching children ethics and critical thinking they will come to the correct conclusion on their own. When one uses the exact same playbook as the worst parts of the group they hate, they become the worst part of the group they represent.
Since some people don’t seem to realize what a bigot actually is:
bigot - bĭg′ət - noun - One who is strongly partial to one’s own group, religion, race, or politics and is intolerant of those who differ.
Edit: Phrasing, mostly replacing the word “you” with generic pronouns.