The problem of unbelief is within their soul, their affections have been misplaced, they love the praise of men, the honors among their peers, more than God. But this is the last thing they would ever dream could be said of themselves. But Jesus said because of this, they cannot believe.
On the other hand, These same people would have to believe in a false messiah. Their soul is oriented towards lies, they have to follow them… for people always follow what they love.
The Words of the Prophet Jeremiah are apt here,
A wonderful and horrible thing is committed in the land; The prophets prophesy falsely, and the priests bear rule by their means; and my people love to have it so: and what will ye do in the end thereof? (Jeremiah 5:30-31)