It is weird, because, the person people are responding to said this.
First, there were mainstream people on the Left that were pushing anti-vax which is why Kennedy was brought up. He has a radio show that is on over 40 stations, written many articles that were posted on major sites.
2nd, he clearly pointed out that he was saying that the Left is not immune, not that the Left was equal.
So he was arguing against a point no one made. That's called a straw man! Glad we cleared this up.