iacisrmma- yes but you can try the best you can on the most significant items and those you know for sure have a link to their nazi past.
Arielski- Who asked for forgiveness? Even those old war criminals who apologized did it to get less of a penalty. Monsters who commited such acts have such a deep hatred rooted inside of them that their apologies are worthless.
Its true that most companies/people might hate jews but if one of the companies blatantly admits to it, would it make it less comfortable to buy their products? Do you really need to drive a volkswagon, or a mercedes or buy an IBM?