Levi Quackenboss is one of the more oblivious and obtuse antivaxers out there. She demonstrates this again with a clumsy post comparing vaccination to religion.
Much of the belief system that undergirds antivaccine views is rooted in superstition. That's why it's not a coincidence that antivaxers frequently speak in terms of contamination due to vaccines as a cause of autism and all the other conditions for which antivaxers blame vaccines and ritual purification in the form of "detoxification" as the treatment. These beliefs very much resemble religious beliefs, and antivaxers project them onto pro-science advocates.