Among other things, we need to ascribe financial penalties to states that wrongfully remove people from voter rolls. States can rightfully remove people who die, move away, or are not citizens from voter rolls. However, there is no consequence to states for making a mistake. This encourages bad actors to deliberately be sloppy in their roll-clearing efforts, and it provides cover for purges based on race and ethnicity.
There need to be damages associated with removing someone from the rolls incorrectly. We should pass a federal law that establishes a new cause of action for such civil rights violations. Were you incorrectly removed from the voter rolls? You should be able to sue your state in federal court, for say, $100k plus attorney's fees, for violation of your civil rights. States can either be deliberate and careful about their voter rolls maintenance, or they can be driven to insolvency.
They're Know-Nothings, in every sense of the word.