A vote about Supreme Court justices usually favors Republicans. Polls consistently show their voters caring more about it, and that if it made a difference in 2016, it was to encourage more voters to back Trump.
https://www.vox.com/2018/6/29/175110...kennedy-retire
I'd also argue there's a better argument for the conservative view of jurisprudence (an understanding of laws should be based on the original intent of the lawmakers and/ or the ordinary understanding of the law) versus the liberal view (all conservative legal arguments are pretext to get what they want; this is not actually an argument for a particular vision of legal understanding although the subtext is the left should act in the same way.)
If someone makes a strong claim based on their understanding of the political views of people they disagree with, it's important to determine whether their understanding is accurate and they know what they're talking about. In this case, there is the claim that Ben Shapiro intentionally bridges the gap between Fox News and white nationalists, which would be a vicious slander if untrue, even if Shapiro wasn't Orthodox Jewish.
There may be a different discussion about Shapiro's shortcomings, but someone has to actually make it. People shouldn't be expected to come up with a better articulated version of someone else's argument.
Arguments have to be followed where they lead. If the claim is that people who are fans of Shapiro are disproportionately likely to become terrible, and that this means Shapiro is bad, that logic has to be applied in all cases. When there are left-wing lunatics, we've got to look into whether they liked Maddow or Thinkprogress at any point, and be willing to make the same argument.
Good and bad people can find something in particular ideologies and communicators; it doesn't make the ideology automatically good or bad. You might agree that the people who go to Shapiro because they're conservative and find Hannity/ O'Reilly intellectually dishonest or too focused on tradition have a point.
To determine whether Shapiro's a problem, it's more important to look at what he actually does. What does he actually say to incite violence? What does he say that no one reasonable can agree with?