Nobody used the word "pure" because it's meaningless in this context. There is a European gene cluster extant now we call White, and obviously some gene flow has occurred. Jews scatter between and among the White and Turkoid/Semite clusters.
I wrote "Jews are generally not White". http://www.politicalforum.com/showthread.php?t=377719&page=8&p=1064960946#post1064960946 What are people to think about the veracity of your claims when you have to constantly misrepresent your opponent?
most Ashkenazi and Sephardic Jews are white. many Mizrahi Jews are not white. All Ethiopian Jews are not white.
Certainly poor people who decide to have 6 kids they obviously can't support shouldn't be given handouts to make it possible anyway. That's welfare taken to an unhealthy extreme.
It's estimated that the overall fraction of European maternal ancestry is at ~65% and at least two-thirds of Ashkenazi maternal lineages have a European ancestry. Haplogroup K (mtDNA) is found in approximately 10% of native Europeans and 32% of people with Ashkenazi Jewish ancestry belong to Haplogroup K and it can be said that one in ten native Europeans share common genetic ancestry with Ashkenazi Jews. Haplogroup K is a descendant haplogroup of Haplogroup U8, which is commonly found in the Basques whose ancestors may have originated from West Asia. Estimated contributions of European mtDNA lineages to the Ashkenazi mtDNA pool shown by major haplogroup.