Earlier quoted context omitted.
not really, his website was based on hong kong, this is a fight against america playing world police, which i'm on board with they have no business going after just a single man so fervently, he's a foreign national and the websites weren't based in the US
He was predominantly stealing US intellectual property, films, TV shows and music and the like. And unlike say normal use of bittorrent, making a lot of money off it. And being the largest player doing that. I'm not sure about the morals but you can certainly understand financially why they've gone after him.
To "steal" is to take another's rivalrous property without permission, such that you now possess it, but they no longer have it.
To "infringe a copyright" is to make and distribute a copy of another person's work without their permission.
Both illegal, but very different things. What targets of copyright infringement are losing is not their property, but the potential extra profit they could have made if they'd retained their monopoly on the ability to copy and distribute their work.
Stealing is illegal because it deprives people of their property. Copyright infringement is illegal because (theoretically) it leads to a world where people are less incentivized to create things because they won't be able to profit as much.