Please add an option/extension so that downvoters provide reasons for their downvoting. It helps to understand the other view points or reasons for disagreement

Please add an option/extension so that downvoters provide reasons for their downvoting. It helps to understand the other view points or reasons for disagreement rather than just downvoting, which appears rude/insensitive, and may be for ideological/racial reasons(which we never know). Upvoting without reason may be ok, in that case at least we know that upvoter is in the same/similar logical region as we are. Downvotes may indicate differences of opinion but do not indicate what/why are those differences. So reasons for downvoting clarifies those reasons and other view points, which I guess is the reason for "comments" in the first place.