1 John 4 says, don’t believe everything someone says to you. Test the spirit of a person to see if what they are saying is from God. A true believer will confess openly who Jesus Christ is, and teach about the power of His resurrection.
Ask the following questions:
Did Jesus come from the Father as God in human flesh?
Did He powerfully rise from the grave?
Did He ascend to the throne of the Father?
Is He coming back?
If someone says no to these questions, do not listen to their teaching.
They have the spirit of antichrist, according to 1 John 4:3.