It's been a long time (more than a decade) since I've flown with anyone that has expressed homophobic opinions (in the true sense of the word). I don't know of anyone that has a problem flying with a LGBTQI colleague.
The angst that I detect is more about the overt politicisation of the workplace- particularly for those who may not support the parallel #equalityis campaign Qantas is running. Even a couple of people I've spoken to that support SSM think the use of the A330 in these colours is inappropriate politicisation- their words, not mine.