Show me where our constitution states that rights are to be lost if convicted of a crime.
I used to be one who thought that loss of rights was just a part of punishment for criminal activity, but constitutionally, but loss of rights is not constitutional. What has changed is our system of justice. When the constitution was penned, a violent criminal, once convicted, would find themselves dangling at the end of a rope. As a society, we largely decided to stop executions, but that did not change the constitution.
I know I am about to take a lot of heat for this post, but the constitution states what it states. I'm putting on my Nomex fire suit now.