If you know Jesus, thank Christ’s Church founded on Peter the Rock 2,000 years ago, which He Himself vested with all the divine power and authority He received from His Father. And Jesus said to reject His servants is to reject Jesus Christ and His Father. This is serious stuff.
Invincible Ignorance is that cultural prejudice which blocks an embrace of the formal Church, but which may not block the living waters of salvific grace endued by Christ in His Church. Willing Disbelief is another matter, a purposeful rejection of Christ’s Church after having full knowledge of her role.