Ridiculous and infantile – one can't be 'anti' something that doesn't exist; there is no such thing as 'PC,' everyone is at liberty to say 'Merry Christmas' with impunity, no one is 'offended' by what the sign says.
You would be surprised. Certain Eurotrash and Canadian lefty on this site argued that the shop should be closed and investigated by the Feds. I consider you fortunate that you have not come across them...Badlands dwellers.
...er; like me in that sense but that alone.
Greg