Liberalism cannot be rectified with Biblical Authority.
“Liberal” churches are simply those that have compromised, ie, become friends, with the world.
James 4:4
You adulterous people, don’t you know that friendship with the world is hatred toward God? Anyone who chooses to be a friend of the world becomes an enemy of God.
(and there are numerous other verses with the same admonition)
"This people honors me only with lip-service, while their hearts are far from me. The worship they offer me is worthless; the doctrines they teach are only human regulations." (Matt.15:8-9).
"You will know them by their fruits." (Mt.7:15-20).(literally, in the case of the united church and some other denominations)
These are a few of my favorites.