My guess is that the phrase 'We Will Not Be Silent' relates to the illegal war the United States is currently engaged in, and the collateral damage that is never reported by the US media.
I support this lawsuit 100% just as I support the man's right to wear that shirt.
HERE'S A HINT! A terrorist isn't going to do something like that which would draw attention and make people suspicious.
People's overactions to these type of situations demonstrate just how ignorant and racist they are.