So why EXACTLY is the ACLU involved? Perhaps this will help..
The LGBT Project brings impact lawsuits in state and federal courts throughout the country— cases designed to have a significant effect on the lives of LGBT people.
The LGBT Project fights discrimination and moves public opinion on LGBT rights through the courts, legislatures and public education across five issue areas:
RELATIONSHIPS – Since the first marriage lawsuit for same-sex couples in 1972, the ACLU has been at the forefront of both legal and public education efforts to secure marriage for same-sex couples and win legal recognition for LGBT relationships.
SCHOOLS & YOUTH – The LGBT Project’s Schools & Youth program defends free expression in public schools, demands that learning environments do not encourage bullying and violence, and helps educators create an atmosphere respectful of students’ sexual orientation and gender identity.
KINDA OBVIOUS, ISN'T IT?