OP you could find out if the sentence is within guidelines, if nyes then try to change them through the democratic process etc.
One could write lots. What saddens me is that some of the most vocal admit they only care because they have children. This is no basis on which to sentence scriminals.
Further, the righteous tend to gather and knock anyone who’s not saying “string them up” etc. This stifles any thought or rational debate.
Lastly, paedophiles have been victims and have had any chance of the normal functional lives we enjoy taken from them brutally in crimes like this. They are wired up wrong through no fault of their own. Of course they have to take responsibility for their actions, but killing them seems a pretty lazy, barbaric and inhumane response.