SO true. Its so hard to be humble as humans. We just have an uncontrollable urge to strike out at others who disagree with us. I know I am very guilt of this a lot of times, even though I know better. In my attempt to be aware of this, if I am reading a post that immediately causes an urge in me to disagree, thats my little red flag that pops up. I try to force myself to think on the matter for while before responding which usually leads to one of three things.
1. I find that I could be wrong on the matter altogether.
or
2. My reply will not change anyones oppionion in relation to the thread.
or
3. I am able to express Gods truth in a manner that is not offensive to the poster, but bring something to the thread that might be overlooked.
Its so hard to be human at times. Even with this safeguard, I still jump in the deep end without looking first too many times.

Forgive me brothers...I do really try!
May God help us to love each other even in disagreement.
Grace and Peace!