what's the point?

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What is the point of articles like these (English translation)? The father of three children and someones husband is dead because he acted foolish and in hatred, deciding that other children and women should be killed this December.
Why let a killer get his message across? Why write about his letter to his family in a way that could make it sound touching? Why be glorifying such dangerous actions?

This Swedish man said that "our actions will speak for themselves".
His wish was that God would let him die in the right moment, and he went off to kill.
And God let it fail.

"You shall not murder" - Exodus chapter 20,13 (Holy Bible)
"And do not take any human being's life" (= English translation)- Surah 17, 33 (Quran)

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Matthew 5:
43“You have heard that it was said, ‘Love your neighbor and hate your enemy.’ 44 But I tell you: Love your enemies and pray for those who persecute you, 45 that you may be sons of your Father in heaven. He causes his sun to rise on the evil and the good, and sends rain on the righteous and the unrighteous. 46 If you love those who love you, what reward will you get? Are not even the tax collectors doing that? 47 And if you greet only your brothers, what are you doing more than others? Do not even pagans do that? 48 Be perfect, therefore, as your heavenly Father is perfect. (from the Bible, this version).