It depend on your definition of racism. For certain, racism can only be systemic. So for them, white people will only experience discrimination. For other its more broad. I believe in the second. White people can experience racism but it will not be systemic.
Educate yourself a bit on Barbary Pirates and Slavery. Hell in battle of Lepant 15,000 Christian galley slaves were freed, 15000 is the number post bloody battle, so the number of slaves at the start must have been at least 30-50k
Hell THOMASS JEREFSSON himself went to London to talk to muslim Barbary Pirates and asked them to stop and they told him to fuck off