I really don't think there is any malice behind it(from the looks of it, it looks like a store bought liverpool banner with British National Party simply put on it).  Anyone doubting th BNPs commitment to N-Ireland should listen to Simon Darby on the radio podcast from last night.     http://www.simondarby.blogspot.com/    go to the heading Last Night's Radio and click on the little thing that says play, simon talks about Ireland a couple of minutes in.