I'm probably the last person that should be posting since I'm still in the process of somewhat questioning a transition, but the first thought I had when I read your initial post is "at least they're not trying to beat it out of you". If they are at least trying to understand, even if they keep trying to talk you out of it, that seems to be more positive to me than you think it is. My parents used a similar tactic, except it was a mix of words and fists, but the result they were looking for was for me to "man up". Not really in the sense that I should be more manly, as I took it, but in the sense that them pushing me down would back me into a corner and make me stand up for myself. Maybe they're not really personally attacking you trying to change your mind so much as testing the waters to see if you've thought everything through and are really as sure as you say you are.