Yes, there are many who will not evolve in this lifetime - however, that does not mean that a more stable environment cannot be created that might support some in shifting and increase the balance overall to a more acceptable level.
The official narrative of these mass shootings is typically not the full story and I have to say, that given the research done by a lot of people and based on my own experience from the 'boston bombing' and others - I am fairly clear that some or many of them are being deliberately staged by corrupt elements of the US government and private mercenaries for their own reasons. The motive could be to install gun control or it could be to instil fear and thus increased demand for government control and weapons sales. I feel that whatever evils appear on the surface, the actual depth of the depravity is far, far deeper and worse.

If learning and being kind is what you feel you can do then that is perfect and there is no need to go beyond what feels right. It is the overpowering of feelings that is causing so much of our imbalance.