Just about any felony is associated with a maximum sentence that is roughly 10 times higher in the US than in Europe. The US justice system is all about retribution, this is so ingrained in the US psyche that ssemingly normal people who think they are humane and have good moral compass will make "don't drop the soap jokes" and basically accept prison rape as normal way of dealing with felons, provided they dislike the crime enough. Even US judges occasionally state in public that they hope that the defendant will die in prison.
People in Europe tend to be more civil in such matters.