We might differ over the how, of late, but no, I don't have any problem with people defending themselves. It's the sort who go around telling other Christians they are or aren't in the Body as though they'd been appointed the task that I think do more harm than they ever will good, both as it impacts the Body and in the secondary witness that provides those outside of the faith looking on.
Your indignation is understood, but is the alternative any better? Is it right or faithful to the gospel of Jesus Christ, for any to give universal assurance, that all is well, and offer spiritual peace where there is no peace, to unrepentant souls who need to hear the command to repent of sins and false beliefs?
IOW's isn't it God's wisdom to commission His own, to separate truth from error, and who will they prove to be, but those who testify to the saving grace of God?
Somebody must discern and preach the truths of God . . . Why not the saved, faithful, confessional, and educated sons of God?
I truly will always remain suspect of any opposition against believers confessing the Savior of God, who witness to and proclaim the Holy Scriptures of God.