A wise business decision - and that's what this is, a business decision. We, as consumers, made it clear that this inclusion puts our purchase at risk. Playtonic wants to entertain an audience and make some money so that they can a) live and b) continue to do what they love. Keeping this in there puts those goals at risk, so they got rid of the risk.
Even if you have a terrific employee who then starts spouting racist ideologies, often the risk outweighs the benefit. Internally, you risk losing other employees who may be uncomfortable or disagree with his presence, and externally you risk losing customers because you are perceived as supporting or enabling that rhetoric.
Culture and values are so important to companies these days, and anything that could compromise those (or the perception of those) is a risk that it's often best to eliminate.