I see where you are coming from... it can be confusing. It helps to define the label you use, as brother Jeff did in his article.
What would someone be who is neither hot or cold? “I know thy works, that thou art neither cold nor hot: I would thou wert cold or hot. So then because thou art lukewarm, and neither cold nor hot, I will spue thee out of my mouth” (Revelation 3:15-16). Lukewarm is in the middle of hot and cold.
I do not have an issue with labels that identify a type or group of people. It is very similar to denominational names, nationality names, etc. The Bible labels different classes of people. Pharisees, Sadducees, Epicurean, Stoic, Nicolaitans, Cretans, and Scribes… and more. We may label them Protestant, Catholic, Baptist, Liberal, Anti, Atheist, etc.
Woe to you, scribes and Pharisees,
hypocrites! (Matthew 23:25a)
One of the Cretans, a prophet of their own, said, "
Cretans are always liars, evil beasts, lazy gluttons." (Titus 1:12)
Of course, there are many more.