I dont apply to a specific age group. From my personal understanding, as people grow up (and of course it depends heavily on education, culture), people will have strong memories from childhood and will reflect on them throughout life.
Hardships would likely cause people to not want their children to have hardships. Loss would likely cause vengeful directions to be righteous.
It's only if the losses or hardships (over their life) are resolved do they go away, otherwise, it is fuel for fire. Whether radicalized or not. In this case, I would like to know what you perceive as radicalized here. I would only attribute terroristic desires or genocidal intentions, or other inhumane (as defined by international law) goals as radicalization.
It is not radical at all to want vengeance, or to punish for pain inflicted. It's natural and even lawful if done within confines of agreed law, and many times required, otherwise anyone can do anything without objection or accountability.
It's not whataboutism: https://www.epa.gov/radtown/radioactive-wastes-coal-fired-power-plants
You said yourself that concrete is not recycled, and it is upcycled only for aggregate, can use any rocks for that. Nobody is converting cement to cement clinker.
Keep idiots from breaking in to the mine that has "radioactive" signs is quite far fetched. You dont just accidentally stumble on an opened mineshaft and accidentally have keys to the lift to go down 100m.