Proportional representation does give a minority voice to these people.
It’s the cost of fairness and it is useful to demonstrate minority views are disregarded for no reason other than because they’re the minority.
How’s that FPTP election going? Nice and stable, no extremists likely to overthrow democracy or anything?
Let’s set the sentence for executing an innocent man to, death.
The first barrier to the death penalty is to make sure verdicts are right 100% of the time.
After that you can begin the debate about **whether it’s moral at all.