Kneel during the national anthem, the continuation of a tradition?

Maybe so but the Tradition changed.
DETROIT (AP) — When football players kneel during the national anthem, Mark Clague sees the continuation of a tradition as old as the song itself.
The University of Michigan musicology professor and expert on “The Star-Spangled Banner” said the song has been a channel for protest since at least 1844, three decades after Francis Scott Key wrote the lyrics during a pivotal battle against the British in the War of 1812. MORE