Earlier quoted context omitted.
I think you're missing the point. /r/conservative censoring views or users is just fine. They can define the norms of their own community and enforce them. Just don't hypocritically declare that other people can't also do the same. That's the point here. The hypocrisy.
If you read messages from the moderators, its normally not about censoring, it's more about keeping up with moderating content. That sub is heavily brigaded (I saw some based that was at 17% upvote). And any sub that has toxic comments on it will be removed by the admins. Going flare only makes their job way easier.
So no, going flair-only is explicitly to silence those of differing opinions.
Don't get me wrong, they are well within their rights to do so, it is _their_ subreddit, after all. However, if they're going to dance around and act like a bastion of free speech, maybe it's time for some introspection.
[0] https://www.reddit.com/r/Conservative/wiki/index/flair_rules...