You could then ask, who are attracted to cults, and why are they attracted to cults.
You then might locate MBTI within the New Age religion.
And you might locate the New Age within the culture of narcissism.
But most of all you might point out that MBTI is not a valid personality test. And the way it is administered is completely invalid.
And finally you might interview those who have found their way out of MBTI.