Former Mexico City mayor pledged to continue supporting LGBTQ rights
LGBTQ officials throughout Latin America applaud historic milestone
Measure passed by 77-4 vote margin
Activists have criticized public officials over hate speech
Authorities say JesĆŗs Ociel Baena showed signs they were stabbed
LGBTQ+ Victory Institute co-organized 3-day event
Country's Supreme Court in 2015 ruled legal bans 'discriminatory'