No, stick around. It might help if you wrote slightly longer comments and better explained your perspective, but looking at your comment history, you appear to be an asset to the community (genuine, no sarcasm). It's good on both sides to see truly different perspectives and be reminded that some of the things we take for granted are not universally held.
I second this, I find sdegutis's comments to be very useful, if only to provide a fresh (and entirely valid) perspective. Contrast is so so needed in our community...
I have "showdead" turned on in my HN profile purely to be able to read constructive comments that have been downvoted to death. I agree with others in this thread that there isn't enough variety of opinion in many discussions on HN, and I'm of the opinion that if you are polite, and especially, if you are erudite (as you seem to be) you are most welcome.
I'm saving my downvotes for those who are rude or insulting to others.
To me, it seems that the main points of disagreement stem from your religious views. So when you do disagree with others on HN, your choices are:
1. State your disagreement and justify it with religious reasons. Good luck avoiding downvotes.
2. State your disagreement without justifying your reasoning. This comes across as over-assuming and somewhat rude. Also, many people recognize your username and fill in the blanks.
Please do stick around. I do not downvote things I disagree with, not if they're written in the measured and sensible manner that you do it. Many people on HN are like that. Instead they will reply (as they have done here in this thread) with polite replies explaining their own viewpoints.
The only reason to leave is if you actually don't care about reading those.