The Guy was passionate about his cause. And he chose to do it at a time when nobody is there at the Bank.
And lets just be honest here. There is no Night Watchman at a Bank late into the night. Atleast 90% of the time.
In Pitronello we TRUST.
And Yes most of the Banks are Stupid Money Minting Machine these days. And Why just stop at Banks. Most of the Stock Market,Shares Mutual Funds are Rubbish.
If he threw a brick into their window or some paint on their porch or something, that could be "passionate about the cause". Making and activating bombs is terrorism.