The Russians were allowed in en masse at a time when Israel had been haemorraging 50,000 sabra yordim a year for 20 years.
1970-90 1 million Israeli sabras, many of them top professionals, many others criminals, had fled Israel permanently, mainly to the USA, Canada, Australia, Germany and Columbia.
The aliya of 1 million Russians actually came just in time to save the physical structure of the State, as they were an army of ready-trained intelligent accountants, bookeepers, secretaries, lorry, train and bus drivers, trash collectors, engineers, soldiers, pilots, doctors, dentists, surgeons, researchers, psychologists, hospital staff, technicians, spies(!), linguists, chess champions, philosophers, politicians, seamstresses, glaziers, clock repairers, shoe repairers etc etc!
Without the 1 million Russians, the Haredim, Arabs and Sefardim who would today be the sole populace, were not at the time up to these jobs, and the State would literally have fallen apart!
Now that the Russian Aliya is over, the few young Neo-Nazis amongst them are aging disappearing. Whilst most are not at all religious, Russians are respectful of Judaism, and above all hate Islam and Arabs!
The Russians were helped by having a talent for languages, and they all picked up perfect Hebrew very quickly, unlike Anglos, most of whom even after 30 or 40 years in Israel, speak a pathetically poor Hebrew.