Anti-EU = anti-surrender
Richard North connects some important dots:
...because of the billions we have already wasted on the European defence project (to say nothing of all the other billions squandered) we are being forced to fight our real wars on the cheap. Because of that, we are in grave danger of losing...
Effectively, pro-war is anti-EU. On the other hand, support for the EU and all it stands for can only ensure our eventual surrender to the fanatics.