Even if one grants that it is a small minority, aren't they still voting for someone who advocates for jailing and killing political opponents?
It is. What's more, such support is roughly the same across both parties, but both parties vastly overestimate the other side's support.
The difference between the two parties is that one elected a leader that agrees with that minority. This 2012 scene from The Newsroom outlines the difference:
* https://www.youtube.com/watch?v=cGsLhyNJBh8
The GOP let (?) the inmates run the asylum.
How's this different than say...
>polls show 99% (or whatever) of people are against crime
>voters elect a soft-on-crime politician, crime goes up
>"I consider the fact that the soft-on-crime politicians got elected to have falsified all research that people are against crime"
https://www.pbs.org/newshour/amp/politics/trump-says-democra...
No, of course not, but I'm sure you knew that, hence constructing this straw man so you can knock it over and claim victory.
However, and more to the actual point, calling for capital punishment strictly because you disagree with the factual words someone chose to write might reasonably be considered "political violence". Especially when the words in question clearly call out your potential political intentions and remind people that said intentions can be battled in a particular way.