Greetings Deliverance.
When you say:
Than we can come to the conclusion it was a very peaceful folk,no murder,no killing of old People who where much older than Noah.
I find the opposite?
71:5
He said, "My Lord, I have invited my people night and day.
قالَ رَبِّ إِنّى دَعَوتُ قَومى لَيلًا وَنَهارًا
71:6
"But my invitation only increased their aversion.
فَلَم يَزِدهُم دُعاءى إِلّا فِرارًا
71:7
"Whenever I invited them to be forgiven by You, they placed their fingers in their ears, covered themselves with their clothes, insisted, and turned arrogant.
وَإِنّى كُلَّما دَعَوتُهُم لِتَغفِرَ لَهُم جَعَلوا أَصٰبِعَهُم فى ءاذانِهِم وَاستَغشَوا ثِيابَهُم وَأَصَرّوا وَاستَكبَرُوا استِكبارًا
71:8
"Then I invited them publicly.
ثُمَّ إِنّى دَعَوتُهُم جِهارًا
....
71:21
Noah said, "My Lord, they disobeyed me, and followed those who were even more corrupted when blessed with money and children.
قالَ نوحٌ رَبِّ إِنَّهُم عَصَونى وَاتَّبَعوا مَن لَم يَزِدهُ مالُهُ وَوَلَدُهُ إِلّا خَسارًا
71:22
"They schemed terrible schemes.
وَمَكَروا مَكرًا كُبّارًا
...
71:24
"They misled many. Therefore, let the wicked plunge deeper into loss."
وَقَد أَضَلّوا كَثيرًا وَلا تَزِدِ الظّٰلِمينَ إِلّا ضَلٰلًا
71:25
Because of their sins they were drowned and assigned to the hellfire. They found no helpers to protect them from God.
مِمّا خَطيـٰٔتِهِم أُغرِقوا فَأُدخِلوا نارًا فَلَم يَجِدوا لَهُم مِن دونِ اللَّهِ أَنصارًا
71:26
Noah also said, "My Lord, do not leave a single disbeliever on earth.
وَقالَ نوحٌ رَبِّ لا تَذَر عَلَى الأَرضِ مِنَ الكٰفِرينَ دَيّارًا
I would have thought if they were peaceful, the majority would not have perished in the flood?
GOD bless you.
Peace.