On the positive side of ledger, without the immigrant jewish scientists, we may never have developed the atom bomb and won WW II.
The main point the Spanish author makes is not that Jews were without faults, but that the replacement of Jews by Muslims is far worse.
I don’t think these 2 things “developed the atom bomb and won WW II” are mutually dependent. By the time we dropped the A Bombs WW2 was already won in Europe and would have been winnable in the Pacific with or without them. IMHO.