Online poker came under attack due to the UIGEA (Unlawful internet gambling enforcement act). It was drawn up by Kyl and Frist, and tacked on to a port security bill in the last session before Congress broke in 2006. It was signed into law by Bush.
Many sites left the US, some risked staying. The DOJ under Obama didn't attack these sites or the players. What eventually happened was that the sites bribed banks to hide their transactions. That's when the DOJ stepped in.
It then turned out that some sites (like Full Tilt) had been lying all along and hadn't kept player money separate from company money. So different charges are levied against Full Tilt than against PokerStars.
Please don't make things up to fit your argument.