Sedevacantists and Hypocrisy

I hate to say such things about my fellow Catholics, but our Lord was not afraid to call out the Pharisees on their hypocrisy, so I shouldn't be afraid to call out the modern Pharisees, the sedevacantists, on their hypocrisy.  Namely, the fact that they claim to be traditional Catholics, yet they refuse to hold the most important tradition of all; submission to the Roman Pontiff.

They, like the Pharisees, seemingly delight in pointing out the sins of others and mindlessly accuse anyone who disagrees with them of "manifest heresy", yet hypocritically ignore their own uncharity and often outright hatred of anyone who doesn't hold their beliefs.  So of them even promote anti-Semitism and conspiracy theories regarding Jews.

Tell me again why I should take such people seriously?

Any why seest thou the mote that is in thy brother's eye; and seest not the beam that is in thy own eye?  Or sayest thou to thy brother:  Let me cast the mote out of thy; and behold a beam is in thy own eye?  Thou hypocrite, cast out first the beam from thy own eye, and then shalt thou see to cast out the mote out of thy brother's eye.  (Matthew 7:3-5)