As shown in comments section under Enforcing mandatory comment when downvoting people don't like to comment on downvotes because it is not productive.
If someone comments on down or close vote, do not start a discussion
He did it to help OP recover. Trying to argue he is wrong is going nowhere. All you can get is frustration downvote following close vote, flame war or other unpleasant effects. So please just don't.
"But I disagree!"
It's your right to cast "leave open" vote. Or reopen vote. Or not to downvote. It's your right to edit that post, if, let's say, it's clear to you but accumulates "unclear what you are asking" votes. Or, if it's not your right to do so just yet, it is meant not to be, by design. Deal with it, earn more reputation and come back to edit or vote as you see just.
Please note that it is not allowed to upvote only to cancel downvote you disagree with.*
"I asked for explanation and..."
From my (and not only my) sad experience, people who asks to provide explanation on downvotes are high-risk. Chance they will argue is much higher than normal. Sorry guys, to some people here your "please explain" is a giant red flag encouraging to stay silent and say nothing. If you want to change that, please start being supportive to people who commented. Do not forget the "assume good intentions" part of the rules. And don't forget that you asked for it.
Bottom line: If you want down and close votes explained, then do not start discussion. Thank, show gratitude, work on what you got and move on. Anything else works against people commenting.
* I know it's from meta stackoverflow but it was posted before SO meta and SE meta split, as far as I can see.