What was the problem with confederate being a part of congress?

The problem with Confederates being part of Congress after the Civil War stemmed from concerns about loyalty and governance. Many Confederates had actively fought against the Union and supported a rebellion that sought to maintain slavery, raising fears about their commitment to the principles of the Reconstruction era. Their inclusion could undermine efforts to rebuild the nation and protect the rights of formerly enslaved individuals. This led to significant political tensions and debates over eligibility for office.