I can only think of the Ursula LeGuin quote as a response:

"We live in capitalism, its power seems inescapable – but then, so did the divine right of kings. Any human power can be resisted and changed by human beings"

if you know someone with a sizeable following, you could probably get 3000 or more people to contact visa and mastercard and very politely ask why their company is allowing an apparent hate group to brag about tricking them into killing legitimate businesses