I am against extremism. I am for remembering that there are many different ways of perceiving the same situation, which leads to differences of opinion.
That someone holds an opinion I consider to be wrong does NOT make that someone wrong-headed.
Lastly, as an example of my personal anti-extremism:
There is a middle path between being a small fish in a big pond and being a big fish in a small pond. Being a medium-sized fish in a medium sized pond. Not thinking big enough (in another person's eyes) is NOT thinking small.