As a gay ex-JW, in my experience, there are two aspects to this. One is the overall hateful stance on gay people, the other is individuals in the congregation who take hating gay people as a personal mission. 100% of the times, every time I met or had to deal with any of those who were personally attacking gay men (and their problem seemed to be mostly with gay men only), they were men who were struggling with their own sexuality.
Once some elder in my congregation had the wonderful idea of solving "my problem" by having me date and marry a sister who also "had a problem". Apparently each other's sexual orientation were supposed to cancel each other out or something...
Anyway, in retrospect, hate for gay people has been a constant in many religions, and only recently has there been a change for the better, that is, for those who give a hoot about religion at all.
That event in Devon is nothing new, and I wouldn't be surprised if the sudden campaign comes about as a result of some closet case in the congregation pushing back against his own being.