It would be factually incorrect to say the Democrats have a history or desire to disenfranchise white voters. You can not become president without a chunk of the majority demographic’s support. Hopefully that helps shine light on whatever you are missing.
You understand my point if you understand the two sentences I had the desire to type out on the topic. I wasn't responding to the full context of the grandparent's post. I was responding to the weak attempt at saying the Democrats and Republicans are the reverse sides of the same coin. Democrats have no desire to disenfranchise the same way Republicans do as it doesn't benefit them. They may try other ways to skew the results towards them but this tactic isn't used by them.