Back in the day, Americans trying to pressure South Africa to jettison its Apartheid system of government decided to put pressure on American businesses and other investors with financial links to Pretoria. Reverend Leon Sullivan created a set of principles in 1977 that ultimately was adopted by the United States government in 1986 that created serious economic backlash for those that profited in South Africa.
The campaign probably worked more from a moral embarrassment standpoint than an economic boycott.
I supported the campaign. I think so did most people that understood how unfair Apartheid was and how poorly it looked on America to support it in the United Nations and through investment. But managing your wallet based on your own moral compass can mean limited options and even limited returns on investments.
Anyone that considered Chinese workers to be under duress and in a state just north of slavery and refused to invest in Apple, missed one of the most amazing stock stories of a lifetime (unless they bought two months ago). The point is we all have issues that we care deeply about. The investing world is wide and surely there are enough stocks out there to avoid one that impacts your sensibilities. If there is a stock or industry that goes against your sense of morality and standards, then it is fine not to invest in or patronize that company.