Systematic racism doesn't require a person somewhere saying "I hate black people" - it merely requires that the system be unfair towards people, correlated with their skin color.
Systematic racism could affect someone because the history of oppression against their race has resulted in them being born to a family that constantly gets evicted from homes due to poverty, which exacerbates the poverty for them and their eventual offspring, which means that the history of oppression against their race continues indefinitely.
I think the bigger question is why does Ben and Jerry's have a page discussing systemic racism on their website. Isn't that a few astronomical units outside the scope of their business?
They are very active in progressive causes. Perhaps when they sold the company to Unilever they negotiated some deal that allows them to continue to use Ben and Jerry website for their activism?