Yes, due to lax immigration policies. The Law of Return mandates the admission of people with just one Jewish grandparent, even if they’re not Jewish in any other sense. When combined with the widespread assimilation that occurred in the old Soviet Union, the result was the immigration of hundreds of thousands of non-Jewish Russians who just wanted out of the rotting carcass of the former USSR. The inevitable result? A violent neo-Nazi cell that attacked haredim, desecrated synagogues, and gave the Hitler salute. Germany’s own law of return was modified a few years back to limit the immigration of russified Volga Germans by allowing the admission only of those who could demonstrate some element of German-ness. Though much of the harm has already been done, Israel needs to do the same for future immigration, pronto. To paraphrase Calvin Coolidge, Israel must remain Israeli.