Nikki Haley blasted President Joe Biden after he condemned her refusal to say slavery was the cause of the Civil War, RadarOnline.com has learned. Haley’s scolding followed Biden’s remarks at a campaign event at the Mother Emmanuel AME church in her home state of South Carolina. Hours after Biden’s speech, Haley fired back at his remarks during an Iowa town hall event moderated by Fox News’ Bret Baier and Martha McCollum. Haley first slammed the president for holding a campaign event at the church where a 2015 racially-motivated mass shooting took place, in which nine Black church members were…