You have to expose yourself to those different ideologies so you can understand the competing thoughts. I read Ayn Rand's books but I am in no way shape or form libertarian, I just read it to understand their view. I like her view, but I don't agree with it. That's why I say I enjoy those philosophers and philosophies, they all have great grounds and good logical points, although I am a utilitarian. However, reading different schools of thoughts is what I enjoy, so I do enjoy their works, but I do not agree/believe with it. It's all about exposing yourself to different philosophies and I just ended up liking, not necessarily agreeing with, but like the ideas of some other philosophies/philosophers.