Hate speech: "We Northern people are ready to destroy Igboland and Niger Delta if President Buhari dies"

This Facebook user has been threatening fire and Brimstone, saying that in the event Buhari dies, they won't spare Niger Delta, Igboland and even Obasanjo...What has Igbos and Niger Deltans...and even Obasanjo got to do with Buhari's poor health?