Those examples are all different controversial issues including politics. We're definitely in a very polarized era. I would attribute this to the change in technology being much faster than generational changes in society, and also the features of the new tech like social media being a global broadcast channel for anyone. Personally I don't mind a little misanthropy because from certain perspectives humans are very silly creatures and most can't fathom to reflect on it for very long. Most people just follow the herd, and so align with their opinions and defend them like the world depends on it. Feelings dominate the minds of most and dictate their identities. There is something like a "meaning crisis" (as it has been called) making people latch on to beliefs that were previously the domain of religions. In my opinion, as AI gets better it will offer a solution to much of this by being an entity without feelings that is also competent and can be used to mediate human conflict. AI might just be a new paradigm for conflict resolution (although probably not with the current tech).