No one is teaching pornographic material to your kids. Teaching them about diversity is not inappropriate.
The world is very diverse and includes lots of different people. Lying to students that these people don't exist is discrimination, which is expressly prohibited in public school and all other public institutions and services.
If you don't like certain people for who they are, too bad. Keep your hate at home. Your beliefs do not give you the right to deny millions of students their right to a diverse and unbiased education.
Trash this idiotic bill. The only discussion we should be having regarding education right now is how to better take care of our overworked and undervalued teachers.