Answer:
cossacks were these ppl from Russia that worked for the Czar and they would burn down Jewish houses and attack Jews in Russia. If you wanna learn more, read "land of hope" its a gud book. Like the Christians during the Crusades who also burn down Jewish houses and attacked Jews in all of Europe, yet that is not the entire story of the christians. This is not the entire history of the Cossacks. Read : The Cossacks by Maurice Hindus... and know the whole story of the Cossacks.