Should a business be penalized for past atrocities?

Is it wrong to do business with a company that used to do business for the Nazis? Allianz, the largest insurance company in the world, was started in Berlin in 1890. During the Third Reich, it insured companies belonging to the Nazi government and/or the Nazi Party. By paying claims on those contracts, it helped fund the regime. Moreover, Allianz paid life insurance policies on Jews murdered by the Nazis to the Nazis. Overall, the company was very cozy with the Nazis during the Third Reich. Today, the company is not anti-Semitic, and they talk about those past wrongs openly. Is that sufficient reason to do business with them now? Where should the line be drawn?