It's grim but I think the key to everything is trying to work out why people would do such a thing. What drives somebody to do that? (as in the cause, not the taxi driver...)
Warped people that latch onto something as their lives have little fulfilment i.e school shootings, gangs, drug cartels, incels, terrorists, extremist groups.
Its why It baffles me that they are put in prison and able to radicalise vulnerable inmates inside.
You wouldn't put a Covid patient in a room full of cancer patients so why put a different type of virus in a room full of vulnerable individuals with little to live for in terms of prosperity, family etc?
Just asking for trouble and future terror attacks.