People can be persuaded to kill themselves (see koolaid). People can be persuaded that arbitrary others are evil and must be exterminated (see Hitler). People can be convinced that dying for the cause is worth it (see 9/11 or kamikaze). People can believe that bringing about the end of the world would cause them to be saved into heaven (see Christian Zionism).
Why do you think it would be hard to convince any of these people to do something really stupid?
In fact, people don't even need to want to cause destruction to do something dumb - "I'm trying to save the world with free bio-fuel, help me create this bacteria" ("and I'm very smart, smarter than Elon Musk") - boom, pandemic.
It takes only one person to fall for it.