I do the same thing. I try to base my opinions on what I believe will piss the least amount of people off. It is very hard for me to make a decision on many issues because I don't think about what I believe in my heart to be right. I think about how others will generally respond to it. I would think this is a self-esteem issue. People with this problem lack confidence in being able to adequately defend their position so they go with the crowd. I can't tell how to deal with this yet. I am beginning therapy so I'm sure I will get to this issue in time. Sorry I can't be any help but at least you know that I'm with you. I would suggest looking for a therapist that is well-versed in SA and that practices with a scientifically proven gameplan, like cognitive-behavioral therapy, to help guide you through your issues such as this.