If a person is truly religious he or she cannot be rude and cannot misbehave with others especially elders. If a person not respecting elders and not showing mercy to younger are not religious. If any one kills an innocent person he cannot be religious. Only in war we can kill a person. We are not supposed to kill or do any harm even to an enemy if they are good to you.
But now in all religion people are not truly religious but communal and that makes enmity even to good people.
Purpose of religion is to realise our creator and to be good to all. If we do strong prayers and behave bad to others that means we are fooling God. If you are good to all including animals and if you do only little prayers, God will accept that
In the present time mostly people do not want to hear what elders say thinking that they know better. The experience of elders is not there with them.
In the present way of life all are engrossed in their mobile that they do not hear if someone tells something. Children know that when parents take the mobile they will be absent minded so it gives opportunity to the children to do what they want without even the parents realising what is happening.
Religion should inculcate all to respect elders and give some thought to their sayings
When people disobey their parents in the presence of their children they are actually giving a message to the children that elders need not be respected or obeyed. They will eventually get the effect of this by their children disobeying them