How was this section of the 14th amendment significant to reconstruction. Basically, I don't understand the last part that starts at this section ensured.....

Question

Section 3. No person shall be a Senator or Representative in Congress, or elector of President and Vice President, or hold any office, civil or military, under the United States, or under any State, who, having previously taken an oath, as a member of Congress, or as an officer of the United States, or as a member of any State legislature, or as an executive or judicial officer of any State, to support the Constitution of the United States, shall have engaged in insurrection or rebellion against the same, or given aid or comfort to the enemies thereof. But Congress may by a vote of two-thirds of each House, remove such disability.This section ensured that the North majority would be safe from the re-admittance of southern radicals who would once again cause problems prevalent to Congress prior to the Civil War.

Answer 1

They were protecting the govenment from the type of devisive argument from the Southern secessionists that had been representatives before the War.

Answer 2

The Constitutional ban on political participation in southern and national politics by former Dixie participants in Civil War opened the door for blacks and northern "carpetbaggers" to get elected in the South. This resulted in a backlash that lead to the popularity of the Ku Klux Klan, lynchings and later Jim Crow Laws in the South. These are my opinions.