I can't say this issue concerns me greatly, but I agree it seems unwise to me. Also, why would they relate the two things in the same legislation? If it happened here I would be a lot more concerned, and I would have some people to worry about. I am not sure, but I suspect that in my country the days of killing homosexuals is past as is the (completely unrelated) practice of adultery. Brunei's population is about 500,000. To me that is a suburban town. Lets see how this plays out and if they actually start killing people they know, because you can bet everybody knows everybody there.
Brunei - Wikipedia
Hopefully not too many people there will be affected on that bit of land on the island called Borneo which I hope continues to be a paradise. Its interesting that Brunei is surrounded on three sides by the much larger Sarawak. That must be an interesting relationship!
Sarawak - Wikipedia