Aijaz Ahmad: The Obama administration has already made two — in my view — very dangerous decisions. One is to send 17,000 more troops right away. And even more dangerous and disastrous in the long term, I believe, is the decision to arm large numbers of militias in various provinces where the Taliban are active. These actions will only destabilize and create a situation much worse for the people of Afghanistan and would make the solution even much more difficult.