It is a very deep, current issue and requires looking at it from different places. I will make an attempt to expose what I think about it.
A generation gap has a high probability of giving rise to conflicting situations because over time situations and things are modified. Change guidelines, access to new knowledge, different means of communication are used, new words appear, symbols may not mean the same, age hierarchies are filed off little by little, rights are recognized for young people, etc. It is therefore more difficult for those of the generation that are going to adapt again to situations that have not lived. There are more migrations than before and these are of different types, there are new university careers and different types of tasks or work. Regarding gender, there are positive advances towards recognizing the role of women and their contribution to society is very strong. Many men do not want to accept this, others can not get rid of their macho customs even when they are not aggressive, the role of schools and their teachers extends from the disciplinary to the social and behavioral filing the differences that children bring from their homes. Children incorporate these school guidelines and are not always understood by their parents or older siblings - probably more submissive - and can grow defensively and with the contrast between places they travel: their home, the street, the school, the church. But, in the end none of this should be looked at temporarily as very new in the trend. Of course, the speed at which changes are currently occurring is greater and this also influences. The premise would be to become aware that in the "other" there is an other with moral, social, cultural guidelines that can not be left aside. Finally, in our time, let us say at the beginning of this century, events of different types have taken place (for example, wars in African countries, especially oil wars, huge aggressions against Palestinians, towards Christians in the East). At the same time in the last 10 years there has been a tremendous increase in economic and financial inequality that diminish the possibilities and opportunities of the poorest to live a good present and project a better future and the improvement of the middle class is inhibited or even it gets worse in terms of their economic possibilities. All this affects transversally to the societies and it is seen in the streets of the cities, in the public institutions and in excluding environments.
Finally, I want to say that I hope you do not believe that I am very pessimistic, but I would be much less so if millennials and young people are supported more, since they must be prepared to lead our destinies.