This is one of the greatest problems Nigeria is facing and it has increased since 2011. In the last few years, thousands of people have been killed particularly in Northern Nigeria.

Pray frustrating the plans of the enemy to destabilize Nigeria and make it an Islamic nation.
Ask God to manifest Himself in the midst of His children. That He should come to our deliverance as He did in Egypt, that the nations may know that He is LORD.
Pray God to spew all troublers of Nigeria who sponsor religious crisis. Ask God to embarrass and put them to shame.
Ask God to comfort, provide, protect and preserve His children especially the northern Christians suffering persecution. Pray that they continue to abide in the LORD in the midst of these persecutions.