It's great to hear that you and your mom are open-minded towards the LGBTQ+ community. It's true that some people find it easier to hate or be intolerant towards those who are different from them, rather than trying to understand them. However, hate is not a natural inclination of human beings. It's a learned behavior that can be unlearned.
The important thing now is to be strong and move on because your family has supported you. In this society, no matter what you do, there will be people who hate you, just be confident, have fun.