Kareem,
Let's just say, that crazy as it might seem, we all get to know each other quite well on this forum once people start to post a few messages. Since it's a forum for discussion and we are all asking each other questions, it really is difficult when in the middle of a good discussion, people post questions which are not at all relevent to the particular forum or the discussion. (and which often are meant to disrupt the discussion not help it)
Having the one forum for serious people to talk together (Muslim-christian discussion) and the other one for everyone to send in their questions seems real logical to me. It doesn't stop anyone from participating, or choosing to remain anonymous if they want to or need to and we discuss with anyone in any forum so it really doesn't matter where you post your questions/comments.
I actually agree with the idea! It's not stopping discussion, it improves it. Registering just means that you are saying you want to be here and do some serious chatting. Now, as you have already used your nickname, we all know who you are anyway "by name", so why not register too?