Considering the Ray Rice vs Gordon thing has been discussed on about every major media outlet since Rice's 2 game suspension was announced? I don't think it's just "Cleveland and hardcore FF circles". A lot of people have a serious issue with the fact that Rice got a 2 game suspension handed down for beating his girlfriend senseless (extremely quickly compared to Gordon's might I add), while Gordon has been waiting for a few months just to find out if he'll be out for a year for smoking a bowl.
Assault and marijuana do not hold the same sentence pretty much anywhere in the states anymore, let alone would marijuana hold a harder one.
1-I think you are overplaying the "vs Gordon" part of the discussion. Ray Rice's suspension was discussed, A LOT, right after his suspension was announced. Gordon was rarely mentioned, except in passing, and it wasn't a focus of many stories/reports that I read/heard.2-There's not much discussion about Ray Rice's suspension any more, and we're barely 2 weeks removed. Perhaps the "two days" comment was hyperbole, but Gordon's suspension (if he receives one) compared to Rice's suspension will not seriously or permanently damage the league or it's popularity.
3-Vick was let back into the NFL after fighting & killing dogs, and while animal rights groups were pissed, the NFL remained popular. Suspending Gordon isn't going to kill the league.
4-Gordon isn't a big name, not to the casual fan. Outside of FFers and Browns fans, most casual fans don't even realize that he is one of the best WRs in the NFL. He had one great season, but he's not a household name like Megatron, ADP, Peyton Manning, Tom Brady, etc.