I think you are conflating two separate issues. The practice of blocking eligible people from voting or registering to vote is certainly a violation of rights (as explicitly defined in the Voting Rights Act of 1965 but which was established under general Constitutional principles). However, that doesn’t negate the legitimacy of an otherwise regular election process, i.e. counting the votes that were legally cast. That Black voters (and women, and Native Americans, et cetera) is a shameful disregard for what should be democratic norms of allowing all non-felon citizens of age of majority to participate in the electoral franchise but it doesn’t illegitimize elections where those rights were not protected.
Although we are in violent agreement that what Donald Trump did on January 6, 2021 was in point of fact inciting an insurrection even if some people want to claim otherwise, he was never convicted in either a court of law or by the Senate during an impeachment trial, which made the attempt in several states to remove him from the ballot a pointless and futile effort because there was no legal basis to do so.
Stranger