Stuxnet was about geopolitics. Colonial was about money (and perhaps geopolitics too). What links the two attacks – which occurred more than a decade apart – is that Industrial Control Systems (ICS) were affected by the attacks. One directly, the other indirectly.
In the summer of 2015, a hacker group called Impact Team decided to take down Ashley Madison (owned at the time by Toronto based company, Avid Life Media) and expose their lax security. Ashley Madison’s high-profile CIO had been proclaiming that the site had amazing security because, as he put it, “It’s not lipstick on our collars anymore getting us caught, it’s digital lipstick; voicemails, text messages [etc.]”.