The way this sounds is that you are more concerned about politics as in people who take party positions and may feel excluded as a group when the majority of the community takes a different position. This is a slightly different issue i.e. party politics, and I think it is fine/a good thing, but it is also important to distinguish the two. This should essentially be under the same umbrella as personal attacks, as they are essentially the same thing.
I don't know whether that is politics or not but I can't imagine discussing Amazon Go as a technology without having that discussion. In fact when you look at HN very little is about particular technologies. Most of our discussion is around the implications.
A talk I recently attended by a data scientist from Amazon had him gloating about how many jobs he could eliminate.
Ironically, the only speaker who brought it up as a major social problem we'll have to tackle is someone from Uber. His solution was less than satisfactory, but at least he recognized the issue.
I don't want to pretend we live in a world of algorithms without consequence.