As far as "very young contributor", I think it is not fair to judge my actions only by my age...
I think the point Jens Ropers was making is that your age and inexperience should mitigate the impropriety of your actions.
I would recommend learning two new skills that will make your work with other wikipedians more rewarding and successful. 1) wait a day before posting a reply, and 2) always approach other people's posts with an attitude that says "I understand you have something valuable to say, and I'm sure I could learn a lot from you." If you do these two things, I'll bet you'll find that people are much more open to what you have to say.
Another funny thing about resistance is that the more you push the more people resist. This cycle can keep going for a long time, but it requires that both sides keep pushing. If you stop fighting and work on some problems that both of you care about, you will often find that resistance melts away.
--Mark Christensen