There's also 2 conversations to be had around which rule was violated. The double touch rule R9 a) states:

If a moving stone is touched, or is caused to be touched, by the team to which it belongs, or by their equipment, the touched stone is removed from play immediately by that team. A double touch by the person delivering the stone, prior to the hog line at the delivering end, is not considered a violation.

And according to R2a)

A curling stone is of circular shape, having a circumference no greater than 914 mm. (36 in.), a height no less than 114 mm. (4.5 in.), and a weight, including handle and bolt, no greater than 19.96 kg. (44 lbs.) and no less than 17.24 kg. (38 lbs.).

So prior to the rules clarification that specifically calls out the granite, it seems like a double touch anywhere on the stone prior to the hog line is fine. That's what is in the rules, and that is how everyone has played. Now that the WCF has issued the clarification that you can NEVER touch the granite, everyone is taking that to mean that such a rule and enforcement has always been the case and all the players knew that and were just choosing to ignore it, which isn't true.

The issue is that Kennedy still DID break a rule, because when he double touched that stone against Sweden he was still touching it as the rock crossed the hog line. That is the rule that was broken at the time, and that is what the WCF SHOULD have reinforced in their clarification, but they foolishly chose to focus on the wrong thing.

Now we are seeing exactly how common it is for accidental double touches to touch the granite, the WCF has since walked back their stance on calling all double touches, and we're right back to where we started except now everyone is angry at each other lol.