By Sonala Olumhense What is to be learned from last week’s insecurity-themed events in Nigeria? Remember: a group of Senators and Representatives began to demand the impeachment of President Muhammadu Buhari, several years after his incompetence, even complicity, became evident. And remember, a video was in circulation days earlier of local terrorists mercilessly brutalising a group of Nigerians they abducted in the Abuja-Kaduna …