The wrath of God is His eternal detestation of all unrighteousness It is the displeasure and indignation of divine equity against evil. It is the holiness of God stirred into activity against sin. It is the moving cause of that just sentence which he pass upon evildoers. God is angry against sin because it is a rebelling against His authority, a wrong done to His inviolable sovereignty.
Pink, Arthur W.; The Attributes of God; Kindle Edition; page 82