I may be ignorant, but I would have at least said happy Thanksgiving AND Columbus day
That would have been extremely hypocritical of me to wish anyone a Happy Columbus Day.
I think the genocide Columbus unleased on the native peoples is not a cause for celebration, but mourning, so I respectfully chose NOT to comment on it. I only mention it now because you brought it up.
ps - I don't mind wishing you guys a Happy Fourth of July, or a Happy Martin Luther King Day