Sir — Militancy seems to have engulfed Pakistan. The root cause of this terrorism is religious ideology, even if distorted. Violence is used to make the masses adopt the extremist ideology or be silent. A few months ago, we had the terrible Peshawar school massacre. Now, by targeting the Shia-Ismaili population in Karachi, the militants have shown again that not even Muslim minorities are safe in Pakistan, let alone those belonging to other religions.