Everyone can be racist.
No group is immune to it, and no one has a monopoly on it.
I am white but my parents job required me to attend school in the West Indies for many years. I saw so many bizarre overlapping forms of racism. Some whites looked down on the blacks and the Indo-Caribbean folk. The Indos looked down on the blacks and whites. The blacks looked down on the whites and Indos. Or the Indos looked down on one but not the other, and vice versa.
As a white person, in that part of the world, I noticed it was the younger generations who were cool with me. Black and Indian kids didn't care if I was white, and generally weren't racist to each other. Meanwhile their parents carried much animosity toward different groups.
Recently, with the rise of social media, and politicians using tactics to divide and conquer, many forms of hate are being used to entrench class and power (and corporate) interests. I think it will get worse.
We need to recognize the class commonalities which bind us, recognize racism as a horrible thing, and not fall into the trap of dehumanizing groups based on the racist behaviors of individuals. In this thread, for example, you already see people biologically essentializing people, and so promoting racist thinking (ie people saying "black people are USUALLY racist" etc). Behavior is always a product of material, socioeconomic and historical pressures.