If one does not wear a hijab or kufi the other 364 days of the year, why wear one on 9/11?

To show solidarity with the ordinary Muslims who are associated with the terrorists and in some cases assumed to be terrorists themselves, merely because they are Muslims.

Do you wear orange on St. Patrick's Day?

Why, does St Patrick's Day commemorate a terrorist attack which causes today's Protestant Irish to be mistaken for terrorists?

Do you wear a red coat on the Fourth of July?

Why, does Independence Day commemorate a terrorist attack which causes today's Britons to be mistaken for terrorists?

Do you wear a kimono on December 7?

Why, are Japanese today mistaken to be terrorists because of Pearl Harbor?

Do you wear a chiton on Hanukkah?

Why, are Greeks today mistaken to be terrorists because of the events commemorated by Hanukkah?

What would you think of someone who did?

They were as illogical as your list is.