* More than 100 killed in weekend attacks in northeast
* Islamist sect Boko Haram fighting bloody insurgency
* President Jonathan under pressure to stem violence (Adds quote, details, background)
By Lanre Ola
MAIDUGURI, Nigeria, March 3 (Reuters) - Islamist insurgents have killed at least 31 people in a village in northeast Nigeria, a lawmaker said on Monday, taking the death toll from ...