I have no hard data about this but I think most Jews that came to the USA before WWII were mostly interested in STEM.  The natural sciences.  This might have just been the natural tendency. For example, my dad went into STEM. [His parents had come to the USA right after WWI. ] Why? I think it was  the influence of his older brother Alex. But did their parents mention this to them, or was it just something that they wanted to do? Violin also. I know my own father was contemplating either a career as a violinist or in STEM. But after those first generations, the interest seems to have waned. Why is this? I think because people are not aware of the statement of the Gra [brought by his disciple Baruch of Shkolev] that "According to the lack of knowledge in any one of the seven wisdoms, one will lack hundred fold more in understanding of Torah."  

[The seven wisdoms are not actually STEM, but that would be the modern equivalent.]

When I was in Polytechnic learning Physics, I recall a lot of the the professors were Jewish, but what really got my attention was when I had some complicated problem, the professors were not around, I went to a bunch of Asian students. And they solved my problem in an instant.