The GP comment wasn't substantive either but the idea, when replying, is to move further away from hell, not jump into it.
As for 'unsubtle appeal to political violence', please abide by this site guideline: "Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize. Assume good faith." It's not at all obvious that you read the comment correctly, and 'unsubtle' is a big overstatement.
I think it's important to understand the context of a statement like this as it pertains to the United States at least. At some point in the last 6 years, the average person on both sides of the aisle has felt as if they have some reason to be quite skeptical of the security of our electoral system. It has been one of the defining issues of two consecutive election cycles. Setting aside the question of whether or not that skepticism is warranted, the rather worrying fact remains: as a whole, our belief in the mechanism of voting is probably approaching an all time low. This is quite concerning.