The BBC link is an amorphous mass of tidbits and factoids, all thrown together. There's no clear link between the bomb and the cartoons, they refer to Baitullah Mehsud as "Pakistan's top Taleban warlord", which is (at the least) contentious, given his (and many of the other tribal "aristocracy"'s) established habit of following the money, and the fact that Mehsud was a Waziri separatist long before "Taliban" became the common tag for all anti-governmental or separatist forces in Pakistan. The tribal connections between Pakistan and Afghanistan, the political connections between Pakistani Pashtuns and the Taliban are more tangled than the BBC implies.