Earlier quoted context omitted.
Do you forget what a shambles Tony Blair was? Led us into a pointless war that cost 100,000s of lives. As bad as David Cameron was, he kept us out of war.
Not really. The UK is bombing Syria at his behest. The joke is that a year or two before that, he tried, and failed, to get the UK to drop bombs on the other side of the war.
There aren't two sides in that war.