The reason those subjects are largely not discussed here is because this is not the place for discussions such as those.
It's like going to a bird watching event and complaining that they don't respond when you try to argue political points. It's just not an appropriate discussion.
I can think of hundreds of examples of HN-appropriate discussions involving privacy, the NSA, military technology, Big Data and the military, where it was strictly verboten to bring up the ongoing wars, which are still very relevant to the HN readership.
But sure, there are other places to discuss war crimes.
Have you ever considered that what you're posting/discussing may not be found to follow the posting guidelines of this forum by some majority of it's users and they're simply trying to tell you that by using the built in feature to do so?
If you haven't in a bit, please re-read the guidelines.