I have a friend who is very left. He's vegan, engaged to a feminist, supports refugees, and is very vocal about his ideology. Before I took the pill, it didn't bother me, I didn't know enough about the world for it to bother me, I just thought his intentions were good and he was passionate in his beliefs and for that he had my respect.
From school he was like a brother to me, but now I can't fucking stand him. I'm a nationalist and he constantly goes on about how the far-right are Nazi, the more knowledge I aquire, the more I realize how little he actually knows and I hate to say it, but it's getting to the point that I'm about to write him off.
I guess what I'm saying is you're not alone in this. It's just a natural growing pain.