Yes, it is wrong for Christian preachers to preach against racism from the Sunday pulpit because racism is not sin. God never ever condemned racism in the Old Testament or in the New Testament.
Jesus Christ never ever preached against racism during His earthly ministry, even though there was a lot of racism in His society. This is because racism is not sin. If racism were sin, then Jesus Christ would have preached against it. It is important to submit to God’s Will, however you like it or don’t like it.
God has revealed Himself and what He wants in the Word of God, which shows the Will of God. God does not want Christians to preach against racism in the House of God, because racism is not sin, according to God, as revealed in God’s Word, the Holy Bible. In other words, every preacher who preaches against racism is preaching against the Will of God as revealed in the Holy Bible. Anyone who preaches against racism is not a faithful servant of the Word of God. A good and faithful servant of Christ preaches from the Word of God, the Holy Bible.
Every Christian preacher who is a true servant of Christ must follow the Holy Bible. He must preach the Word of God, not words of the world. World condemns racism, but Jesus Christ never ever condemns racism The Holy Bible never ever condemns racism, because racism is not sin. Every true servant of Christ must submit to the revealed Will of God as found in the Holy Bible.