That's a bit silly though. An implicit threat still requires the belief that an act of violence will be carried out. Do you honestly think anyone in Europe believes America will pull back the velvet glove just to find one person? It'd cause the disintegration of NATO.
Which threats were most salient to which parties is an interesting exercise but not the main point.
Notably, it was in Evo Morales political interest to appear to be "sticking it to the man", so undoubtedly he had no problems with making the impact appear greater than it was. Not to mention his TV interview the very day before can be read as a kind of dare to do just this. Had he really been carrying Snowden with intent to protect him, he surely would not have played this brinkmanship game in the first place, but even if he did, he did not need to land where he did.
In other words, the US got played by Evo Morales who successfully demonstrated that the US can be pretty unreasonable at times. But the US did not take his plane hostage, not even via its allies; the situation is entirely unlike the Belarusian case at hand. Seriously: is being offensive to a diplomat that's knowingly playing a game of brinkmanship somehow equivalent to abducting a civilian plane?
In the end both the US and Belarus grounded a plane for political reasons, and that’s what makes the situation the same in many people’s eyes. It’s just that one of those countries doesn’t have the clout to make its means look harmless and benign so had to resort to a fighter jet escort.