A great irony here, of course, is that Evangelical Christians in the United States are highly disproportionately likely to resist vaccination. Anti-vax sentiment is concentrated in Evangelical congregations.
I fear you are correct when you discuss the possibility of anti-Semitism rising in today's Trump-centered political world. It already is in alt-right circles.
How ironic it would be if that anti-Semitism was fueled by the same sorts of beliefs about vaccines that the alt-right, Evangelical Christian world encourages.