Sexism is the act of looking down upon someone for their sex
WOMEN CAN BE SEXIST
Racism is the act of looking down on people for their race
YOU CAN BE RACIST AGAINST WHITE PEOPLE [See Poland, Russia, France, !!!!!!!Balkan countries!!!!!!!, hell just study any event in European history, in involves one race (Germans for example) looking down upon another race (Poland here) and fucking invading their country]
I think you are mistaking prejudice and discrimination for racism. Sexism and racism are power structures. The oppressed are not the oppressors. German is not a race it is an ethnicity.