I think that the truth should rule all. If that guy is fabricating everything, including his own background, then that should be exposed. And his fabrications should be removed.
Vaccinations affect more than just the person receiving them. They have a major influence on the health of innocent people associated with non-vaccinated people.
Unfortunately, for instance, the incidence of measles is rising rapidly after falling dramatically previously.
As a public health issue it is sad that misguided folks don't vaccinate, leading to spread of disease. But it is especially disheartening to find out folks are faking information to scare parents into not vaccinating.