OP this is a contemporary question and i think we should all add a voice to it, Thanks for bring this up, many people never read about it until today. I followed up this news and also made my contribution on various media. This reduced Nigerian judiciary system to zero. Its an eye opener that there is no justice in the Nigerian legal system. The international community condemned the judgment, but since it was Supreme court judgment its very hard to reverse.
It shall not be well with the judge that gave that judgement, it further show that in this country cow and herdsmen are serious citizens and that is why the government are playing politics with herdsmen attack on farmer's crops and killing the farmers, at the end no single herdsmen has be arrested. Government has hands in it, and they are being sponsored by politicians to achieve their political interest. The case of Jackson Sunday was the worst and obvious evidence that the Nigerian government does not care about our life and properties. Wherever you are avoid trouble and if you perceive one run far.
You're obviously judging this case with your emotions. This is what the law says, "The right of self-defense is a fundamental right, but it is not a license to take the law into one's own hands."
I'm not trying to be in support of the killings carried out by the Fulani Herdsmen across the country but the fact is that, the man in question has gone against the law by killing the Herdsmen. He had a better option of running away because, running away from a fight is all a means of self defense instead, he personally took the laws into his hands and killed the Fulani Herdsmen. The law forbids that!