It's nothing to do with people not 'being able to cope with people having a different idea about education', it's about the fact that it's taken over 50 years for LGBT relationships to be acknowledged as perfectly normal within society, and for that normality to be taught in schools to try to stem the huge amount of stigma which teens who are gay felt in the past, and which frequently led to suicide or mental illness. Fundamental bigots are now trying to dismantle this process to further their own agenda.
It's not an 'opinion' that gay relationships are valid and okay- it's the law, and anyone deliberately trying to state that there is anything abnormal, 'disgusting', unnatural or wrong in that is potentially committing a hate crime.
Sex education should be compulsary in all schools, and the teaching of LGBT relationships ought to obviously form part of that. Birmingham police need to step up and address this shambles firmly.