Complex sentence: Heimbach, who believes the South should have won the civil war was previously the founder of Towson University's White Student Union, and following the Charleston shooting he referred to the perpetrator as "a victim" of a society that oppresses whites.
Split into simpler sentences: Heimbach, who believes the South should have won the civil war, was previously the founder of Towson University's White Student Union. Following the Charleston shooting he referred to the perpetrator as "a victim" of a society that oppresses whites.