Thank you for pointing out this comment thread, but next time please flag it instead of posting on meta. That's easier for you and easier for us.
To answer your question: No, we generally do not want debates on this website. As the help center says:
Politics Stack Exchange is for objective questions about governments, policies and political processes.
It is not a place to advance opinions or debate, but rather for exchanging objective information about the policies, processes, and personalities that comprise the political arena.
Therefore we take the policy on comments very seriously here.
Unfortunately that does not stop some users from engaging in debates. That's especially a problem on questions which hit the "Hot Network Questions" sidebar and thus attract a lot of users from all around the Stack Exchange network who are unfamiliar with this website. But there are also some regular users on this site who just seem unable to not engage in debates on issues they have strong opinions about.
We moderators can not be on this website 24/7. Comment moderation is tedious and time-consuming, because people like to post a lot of comments on this site and it's often a difficult judgment call to decide whether or not a comment is a meaningful addition to the question or just chatter. And it's not a very thankful job either, because people tend to get far more agitated over someone deleting their comment than over letting someone else's comment stay.