I used to be an opinionated person in college. I went to a fairly liberal college and drank their cool aid. Then I graduated, grew older and saw a lot more nuances in life. These experiences turned me to appreciate more about grey thinking. Sure there are some cases in which we can draw a fine line between black and white zones (like rape). But most things (problems) in the world have some shade of grey to it.

For example, when it comes to events we read in the news (esp. the ones published by western-based media) about other regions have heavy bias that born out of both western values and limited (very, very often one sided) info they obtained from the people they hang out with. Even reputable publications like NYTimes and BBC, have obvious biases if you have been to the places they are reporting about. That's why I stopped believing everything I see on mainstream media and start to ignore it mostly for almost a decade now. I also avoid social media (Facebook and to an extent Reddit) because what we see there mostly represent people's fleeting reactions and emotions to things that really doesn't matter to my life for the most part. Doing that really makes my mind free of a lot of bad karma.