Christmas, the time of year we celebrate the saviour of Christianity by eating a Halal turkey
What are you implying? That Christmas shouldn't be celebrated by non-Christians?
Islam is an evil religion so no.
Christmas has been an established Christian festivity, you have that as a fact, but you shouldn't restrict people in celebrating it just because they are not Christians. In fact, you should be more welcoming and you should  invite more non-Christians to celebrate it with the hopes of converting more people into Christianity once they find out that Christianity is a good religion to convert into. I wouldn't force them to convert, though.