Why do you have to wear green?

Answer 1

I myself do not wear green nor orange on Saint Patrick's Day because either colour worn on that day would show an allegiance to one side or the other of this stupid rivalry between the Catholics (green) and the Protestants (orange). These two camps have been murdering each other (and innocent bystanders) for hundreds of years. It is totally sick. If you think I am wrong, try wearing the wrong colour at one side or another's parade or football game in Britain.

Wearing green or orange on that day would be like being in Africa and wearing something that identified oneself with either the Hutu or Tutsi tribes in Africa which have been hacking each other to death on and off for decades.

You could wear their colours, but when you know what has been associated with the whole thing, why would you want to? So don't let anybody tell you you have to wear a certain colour.