It is a noble goal to not to do business with an evil entity but it can be very difficult if not impossible to monitor or verify this. Even governments with "peaceful" charters make poor decisions regarding which entities to do business with or give money to. All too often financial aid given to help victims ends up in the hands of dictators and tyrants (what, me worry? we can always just print more money to give away right?? :-P)

In this day and age it is impossible to know for sure which side you are on and who the "good" guys are so why should businesses somehow be any better at knowing this?

Business are better off staying out of politics or deciding who is worthy and who is not. Public Corporations have a fiduciary responsibility to their shareholders: to make good business decisions and be profitable NOT make political statements. Private business has more leeway in what they can and can't do but they would be smart to stay out of picking winners ad losers or good guys and bad.