You make a good point there because there are many people who believe the Iraq war in particular was illegal, including the British governments lawyers and the UN. You can listen to what actually happened on my link. He does appear to be talking of raising money to bring Bush and Blair to the ICC. Interestingly when I landed on a Pakistani site they were not even discussing this, they were discussing the emphasis of his talk which was evolution not revolution. They thought he sounded a bit too English and preferred revolution.
You also need to understand how badly the war against Afghanistan has harmed Pakistan, the number they have dead and the infiltration of extremists into Pakistan and the social consequences of that. I imagine that that will make no difference to some here but imagine if you were living there. Might you not think justice should be the same for all? I'd be extremely surprised if this speech came from an intent to inflame. I suspect it was quite the opposite, though I can understand it might not be seen as that from people here.
Anyway, nothing to do with Obama, it is just Bush and Blair.
Suspended peer says Obama 'bounty' a 'pack of lies' - Channel 4 News