The whole point of voting fraud is voting when you are not allowed to. Don't see how that is influenced by being allowed to vote. Also a pretty big stretch in my opinion.
I think you agree with my phedophile example right? If you do you recognize that when you have committed certain crimes it is justified by society to lay certain restriction on you for public safety.
I think, altough with less certainty that you agree that the crime should fit the punishment and that after a certain time certain rights should be restored?
If you acknowledge both those things than you should acknowledge that it's all circumstancial. And that you can not universally restore all rights to citizens who committed a crime, or conversely universally deprive people of all rights.