Because they build good stuff and what their employees do with their money is their business and not Sitkas. Same as its your business to not support them if you dont want to.
So you're ok spending money with a company when you know that a portion of your money is going to be paid to someone like Charles who will undoubtedly give a portion of it to propagate gun control in the name of false truths?
Youre willing to fund, in a roundabout way, gun control because they build good stuff?