Is Kwanza completely made up? who celebrates this and what for?
wikipedia can tell us. It was made up by black leaders during the civil rights revolution because they were tired of celebrating the same holiday as their oppressors.
your attempt to articulate Kwanzaa as a pseudo holiday is no less an attempt to deny Africaness than the white oppressors who assimilated blacks into white culture for years. Furthermore, the mere assumption that celebrating Kwanzaa is a civil rights activist defiance against Christianity is a muttled perversion of WASP elitism.
Kwanzaa is no more made up than Christmas (insert Jesus was not born on 12/25 argument here). They can coexist peacefully.
Throw it on the banner.