Can confirm Trudeau is right. Most of these vocal anti vaxxers are what he claims. It goes with the territory. Those that want to believe everyone else is wrong and they are the sole correct individual also fall into the tropes of superiority complexes's of various ism's. Having good reason to not be vaccinated isn't anti-vax. For example, active blood clotting. Anti vax is where an individual believes, with no knowledge, or misapplied knowledge, believes it's "wrong". Notice the "belief" involved. They don't want to listen to doctors and nobody can tell them nothing. It's the definition of applied ignorance.
These people have killed plenty of others. On the count of people killed and economic costs - it would be anti vaxxers that are the "mad men".