“the thief on the cross did SOMEthing to get capital punishment”
You have no idea why he was hanging on that cross. Could have been for stealing a piece of bread.
Maybe you should read up on the life of Paul(Saul)before his conversion on the road to Damascus if you are in question of the scope of God’s salvation. In my experience, people who immediately bring up mass murders in a discussion of salvation are gambling on the misconception that since they didn’t commit “those” sins they are good to go.