There are a few things wrong in that piece.
Lincloln supported the fugitive slave law because it was a law protected by the Contstituion, not because he agreed or disagreed with it. To say that because one supports a provision of the constition it means that someone agrees with the provision is a flat-out false hood. Lincoln made many comments and sttements showing that he disagreed with the concept of the fugitvie slave law, yet he supported the Constitution.
Article 2 (only one section)
No Person held to Service or Labour in one State, under the Laws thereof, escaping into another, shall, in Consequence of any Law or Regulation therein, be discharged from such Service or Labour, But shall be delivered up on Claim of the Party to whom such Service or Labour may be due.
2nd, there were no Evangelicals in the 1860's. Some try to trace the movements to the 1750's but it is simply not the case. What you had in the 1860's were main-line protestant denominations. The movement that one would consider the birth of the Evanglicals occurred in the late 1880's the the early 1900's. Primarily due to evangelists like DL Moody, he of the Moody Church and the Moody Bible Insttute, and Billy Sunday among others..
Billy Sunday played for the White Stockings.