Apprising Ministries has an excerpt of a lecture Dr. Walter Martin did in the 1980’s entitled The Cult of Liberal Theology, which is just as true today:
Let me tell you something that I have learned; I know the liberals. I know them well; I was one of them. And they are the most dangerous, insidious, and all-pervading cult that’s loose in the United States right at this moment.
They make the Jehovah’s Witnesses, and the Mormons, and all of the Mind Sciences, and the Occult, look like Sunday School teachers. Do you know why? Because these other people are outside the Church; and these devils are in it! And they’re doing it in Jesus’ Name.
They do not believe the Trinity; they do not believe the Deity of Christ; they do not believe the Virgin Birth; they do not believe the vicarious atonement; they do not believe the Bodily resurrection, and they have grave doubts about whether Jesus will ever come back again, and that the Bible is itself the Word of God. Yet I could give you a list of them that infest—and that’s the proper word—infest our theological seminaries; and our church related schools, and our denominations.
And this theological flea infestation is ruining the lifeblood of the Church, which is evangelism. And, you think these are very strong statements; I intend to back them up in—if necessary—excruciating details. For any person who does not know that today in the United States, and in denominational structures world-around, we are in an accelerating apostasy does not know—I repeat—does not know what’s going on…