Just checking that you did serve? I myself did not. But I think only those that did serve have the right to call someone on it when making a point. If you did, then thank you. If not, then, well, you know.
If someone is claiming a vet who served their nation with honor deserved to be murdered because she was supposedly a racist Nazi then yeah I think anyone can go ahead and tell that person to shut the fuck up and point out some facts.