Having been stuck in hospital during the recent heatwave on a ward with no openable windows or ac, I feel sympathy for anyone stuck in this heat with no relief.
You can feel sympathy for someone, even if you don't think they're a good person or see that with the limited resourced, it's hard to argue for resources for them over others.
personally i prefer the trail blazer that was Zimbardo as he got there first and that was true raw data
You can prefer what you like, but the guard participants in that study confirmed that they were encouraged and directed to act a horrific manner - and even with that encouragement, only around a third actually did so, so Zimbardo's conclusion that the actions are entirely about environment aren't even strongly held up by his own data . Zimbardo had a conclusion he wanted to reach and bent the study and the results to reach them. It's used now as the prime example of unethical and poor research.
Those structural issues of being encouraged and incentivised to violence also played a role in Abu Gharib, where again, it wasn't a majority involved even with the power structures as they were.
Really if you want to claim 'the environment makes them do it' rather than individual choice, than you should support more support and better environments to help people be less violent. As with most things, environment is one, but not the only factor.