Please answer the following question: Given the following passage  "In Israel, the term Ashkenazi is now used in a manner unrelated to its original meaning, often applied to all Jews who settled in Europe and sometimes including those whose ethnic background is actually Sephardic. Jews of any non-Ashkenazi background, including Mizrahi, Yemenite, Kurdish and others who have no connection with the Iberian Peninsula, have similarly come to be lumped together as Sephardic. Jews of mixed background are increasingly common, partly because of intermarriage between Ashkenazi and non-Ashkenazi, and partly because many do not see such historic markers as relevant to their life experiences as Jews.",  answer the following question. Note that the answer is present within the text.  Question: Why do marriage of mixed jewish backgrounds occur more often?
A:
many do not see such historic markers as relevant to their life experiences as Jews