He saw the man breaking into his house on a video doorbell, armed himself with a knife and went with his half-brother and killed the burglar. He has been jailed for 19 years.
Yes the violence he used was very extreme, but the burglar was breaking into his home! It is unreasonable to expect a dispassionate response. People should be able to defend their home and their family from intruders, including using force which would be considered unlawful or unreasonable in other settings.
Even if he must be found guilty by law, the sentence should take the circumstances into account and it should be a slap on the wrist.