If you are speaking in reference to the video by Zava Zecharias, he is not looking “deep into his soul” to see if Mormonism is a cult, he knows the Word of God.
The issue he speaks of is the deity and sufficiency of Christ. The Trinity and the virgin birth are two other major issues that distinguish cults from orthodox Christianity, or what Jesus Himself teaches, or what the Bible teaches. He is saying this cannot be productively discussed in a general (worldly) forum because of all the baggage (many other added-on doctrines or beliefs) that people have. Thus he is saying, be wise in discussing it.
I believe “When do we get liberated?” is pointing out that many pointing to the Mormon religion do so to deflect from (or just ignore) their overt slobbering excuses for and approval given to Islamic terrorism and sharia law.