LGBTQ, intersex activists back Lula ahead of Oct. 30 runoff
Rafael López Aliaga is an Opus Dei member
Erika Hilton is a former sex worker, member of São Paulo Municipal Council
Erika Hilton and Duda Salabert threatened during campaigns
Neither candidate received 50 percent of vote on Sunday
Alba Rueda is a transgender woman, long-time activist
Document would have enshrined LGBTQ rights in country
