Jewish Mathematics

http://en.wikipedia.org/wiki/George_Cantor#Cantor.27s_ancestry
>Cantor was frequently described as Jewish in his lifetime

It seems clear that Nazi Germany did severely persecute what it defined as “Jewish mathematics”. In his book “History of Mathematics: A Supplement” (Springer 2007) Craig Smorynski said: “… the change of mathematical direction … would reach an extreme in the 1930s with the nazi distinction between good German-Aryan anschauliche (intuitive) mathematics and the awful Jewish tendency toward abstraction and casuistry.

>>16
Here, I'll give you some simple examples: the area of a circle (or radius 1) or the length of the diagonal of a square of length 1. If you use math, you can easily calculate what the number will be, even if this number is infinite. If you actually draw/construct an object resembling a circle or a square, you'll find out that the numbers you obtain from direct measurement will be very close (up to some small error, due to the discrete nature of your object) to those when you used infinitesimals. Modeling the length using infinitely small granularity is a lot easier than having to deal with all the details involved in real-world granularity (which will be close to the result you got when you used infinity, up to an error which can be realistically estimated). The math involved in the real-world case would include all kinds of variables you won't be able to account for and only complicate things up to the point where you won't be able to get much work done.