ISIS isn't the worst terrorist group
All the campaign talk about ISIS...and they're not top of the threat list. But we don't care about Nigeria as much as we do about the Middle East, for oily reasons.
The World’s Deadliest Terrorist Group (The Atlantic)
The 2015 Global Terrorism Index, published by the Institute for Economics & Peace, found that Boko Haram, the Nigerian jihadist group, was responsible for 6,644 deaths in 2014, compared with 6,073 at the hands of ISIS. Boko Haram, which was founded in 2002 as an Islamist movement against Western education and morphed into an armed insurgency in 2009, has rapidly expanded its scope and ambitions over the past two years, achieving international notoriety in the spring of 2014 by kidnapping more than 200 schoolgirls. Much like ISIS, the organization controls territory in Nigeria (although it has lost some of it over the past year) and has declared a caliphate in that territory.