Why did northerners dislike Johnson's reconstruction plan?

Northerners disliked Johnson's Reconstruction plan primarily because it was seen as too lenient towards the South, allowing former Confederate leaders to regain power and influence without sufficient protections for newly freed African Americans. Johnson's approach did not include strong measures to guarantee civil rights or suffrage for Black citizens, which many in the North viewed as essential for a just and equitable rebuilding of the nation. Additionally, his frequent vetoes of legislation aimed at protecting these rights further alienated many Northerners who were advocating for a more rigorous and inclusive Reconstruction effort.