Hypocrite?

Going home over break, I was confronted by something. Apparently my brother thinks I am a hypocrite. But it wasn't him who told me, it was my Dad. For the last several months my brother has treated me with little to no respect whenever I have been around him or talked to him, and I have had no idea why. So my Dad tells me that my brother considers me a hypocrite because my opinion has changed about alcohol. Before I came to college I was very against drinking and alcohol for many reasons. I thought I was supposed to think that alcohol was bad and that if I didn't my parents would be mad at me, even though my Dad would drink a beer every now and then. And, even though it's a really bizarre reason, I thought that if you drank just a little you would become an alcoholic. Don't ask why I thought that, but I did. As I've grown up, though, I have learned about things and changed my mind about a lot of opinions. Now, I think it's perfectly fine to drink as long as you don't get drunk and you are of legal age. And I have had a couple drinks since I've turned 21. What got me the most was the question my Dad posed to me - "So were you a hypocrite then or a hypocrite now?" That hurt. Does he really view me as a hypocrite? Is it not possible for 'the talk' to change as long as 'the walk' does as well? It hurts even more that my Dad thinks of me this way than if my brother does. My brother is only 14 and thinks he is 'the man' and knows everything. One day he will realize my point of view...maybe. My Dad on the other hand... Anyway, that's what's on my mind.