gay porn was not banned in the UK, but rather things associated with violence, aggression or non-consent; as such I fail to see the link to religion.

I'm not sure how requiring age check relates to being non-secular either. I'm not religious, but I don't think children should watch porn.

UK bans a lot of perfectly consensual BDSM porn, for example.

> violence, aggression or non-consent

That was overturned.