There is no Constitutional right to vote in a Primary Election.
This is not simply an issue of a simple "Constitutional right to vote in a primary election". What we were talking of here (in our little part of a thread) was about preserving a Republic and the actions of a state that could possibly jeopardize the rights of American citizens in general.
You really should do a little in-depth study of this issue before this case begins and when you do, it will make more sense to you. You might even enjoy watching the events of the case as it proceeds once you understand it all and what is being considered. But you really DO need to understand the difference between the federal and the state aspect of this first.
Perhaps a google search or two on something like "state rights in a republic" or "federal involvement in state primaries", or "corruption in state primaries and Constitutional protection"??? Those would be good starting points for you and would help answer your earlier question as to what rights could have been violated or what a state (or commonwealth) may have done to intentionally hurt and/or damage our Republic form of government in the United States.
As I said, we don't know all of what we actually have here until the case brings forth the evidence to the public, and right now, it's just the appearances of the VA GOP that simply "look" bad, but we'll certainly have a better idea of any possibly unconstitutional actions once the hearing begins, and you'll want to be prepared to understand it a little more then. Good luck!