USA no doubt has done a grave mistake in giving funds to nations like Pakistan and also was indirectly the cause of rising terrorism, but they have also tried to make amends as and when needed. European countries have been extremely tolerant about Islamic refugees, many of whom have stabbed them in the back. Germany has a refugee policy where they are taken care of with even unemployment benefit given until they find a suitable employment, what more should they do? In fact ,, now they should close their borders and make sure the ones taking advantage of their hospitality behave as they should !They should make sure that each one is accounted for and kept under surveillance !
Now in our country we have experts like Mani Shankar Aiyar and Azam Khan supporting ISIS...so how can one blame USA? USA too might have felt the same when they supported or sympathised with various terror outfits..