This is mostly faux outrage. Brendan is one man, an easy target to scream and shout at.
Notice how nobody is protesting outside mosques and embassies where under Islam, the penalty for simply being gay, let alone getting married, is DEATH.
I would warrant that a larger proportion of HN's audience feels some kind of connection with the technology world than they do with that of Islam, and it feels more reasonable to clear your own back yard out first before complaining about the state of your neighbour's.
As of 1999 in Iran, more than 4,000 lesbians and gays had been executed since the 1979 Islamic revolution. ... As of 2009, homosexual relationships, acts or behavior are illegal in 36 Islamic countries. 10 impose the death penalty.
I'm not saying that Jewish and Christian religious texts don't also contain similar punishments, however, it's quite clear that anyone who believes in all the things the Qur'an says would have to believe that it's acceptable to put atheists and homosexuals to death for no other reason.
Similarly in most judeo-christian religions you see similar opposition to homosexuality being treated on an equal footing to heterosexuality, not to mention the rest of the sexual repression commonly found in those religions.