I have no idea if this is the case with Starbucks not having done the research myself however, it is not unheard of for Ceos to use their companies’ profits and popularity to promote personal political agendas. This is why some people are interested in the politics of the people in charge of stores that they patronize.
I personally don’t care. I spend my money on the product. What is done with the profits is irrelevant to me.