Predator self destruct device goes against the supposed honor it has

Why should we assume that all Predators have the same sense of honour? Like humans, I'm sure they have different personalities and we've seen it in this franchise. Some have a sense of honour and respect, like the Predator that left Glover the gun, and the one in Alien Vs. Predator that if I remember correctly, also gave the girl a weapon after helping to defeat the Alien Queen. The one in the original lacked it as it was willing to blow up the human who thwarted him.

I literarily had that exact same conversation with my best friend years ago. Specifically in context of the second one. The predators don't believe in killing unarmed civilians but when the predator activated his self destruct device whilst dangling on the ledge of that one building. He should have been obviously aware that doing so would kill all citizens nearby. Some of them being possibly unarmed.