Interesting results from your word search project - but context is also important.That view is completely wrong. Vaccines had been a demonstrated technology for over a century by 1930 in the case of smallpox, and over 50 years in the case of diphteria. In fact, the very first Nobel Prize in Physiology in 1901 was awarded to those who discovered a method for producing diphteria serum!
I would imagine that in the 1930s, even the non-religious press was producing a lot of literature on aluminium and vaccines, especially given that the latter was at the cutting edge of medical interventions at the time.
https://www.nobelprize.org/nobel_prizes/medicine/laureates/1901/
The fact is, going against aluminum or vaccines in the 1930's was quackery. They were fools and made fools of themselves for decades.