See that right there tells me that the Rizzutos didn't thrive for so long simply because Canada is soft on organized crime. They were criminal geniuses. If American dons could go back to those old-world values they'd last a lot longer.
I think you have it a little backwards... The dons with the old-world values wouldn't want to be in America because of law enforcement scrutiny, they are savvy enough to realize that and stay in Canada where it's safer. If Vito was in America for his whole run he wouldn't have lasted as long. I still think Vito was brilliant as a boss but Canada really is waaaay softer on these guys than the U.S would be.
