No, they shouldn't care about whether people of color, et al. are on that side. But count me unsurprised that that is where your mind went to: identity politics. They should vote Democrat because the Democrats unarguably have better policies per just about every qualified appraisal, be it by economists, scientists, legal experts, consumer advocacy groups, social scientists, or just about anyone with a brain, and the last several Republican administrations, but this one most of all, have been policy disasters and have been marred by corruption and conflict of interest in doling out massive tax cuts, government appointments, and regulatory favors to powerful private interests. As far as his status as a business owner, the proof is in the pudding: Democratic administrations have been favorable to small business, while Republican administrations have been favorable to massive corporations.