Second, it means that we have to take practical steps to prevent hate getting into power. At present that means that we most definitely have to support proportional representation.
Third, when there is real difference we need to respect it. When the capacity for compromise has ended (and most of life is built on that capacity) then it is time to say that there is disagreement, and to respect that right to differ and to uphold those who do, because that is key to democracy. In other words, disagreement must not be hateful.
We must have a democracy which does not allow the other lot to gain power, whatever the will of the demos.