Have a different opinion to you is not close-minded. Being unwilling to discuss ones opinion sensibly, eg labelling those whose opinions differ to yours as "close-minded", is close-minded.
Please re-read what I wrote and what I responded to. It was a post which was being downmodded because people didn't agree with his opinion, and I was opposing those who were suppressing his opinion. As in, those that were downmodding rather than supplying discussion content were close-minded.
This isn't supposed to be reddit, where people downmod something because it is an opinion that they don't agree with.