Lead an army of cats to conquer the world!!
There's many answers for this question, as long as it's a similar word to disbelief. President Roosevelt's reaction was pretty much thinking, "This is unbelievable." So therefore, you can put disbelief or distrust.
Answer:
They had a huge impact- creating a global wave of anti-semitism.
Explanation:
Especially during the 19th century, before the rise of Nazi Germany, pseudoscience on the basis of religion was extremely prevalent. These pseudoscience made outlandish claims like "Jewish people aren't human" or "Jewish people work for the devil." This anti-semitism created a wave which spread like wildfire across the globe - eventually leading to horrible, oppressive conditions for Jewish people.
