I never suggested that you wouldn't be okay by sticking to any of your principles, regardless of what happens in Venezuela. What I'm saying is that the situation in Venezuela is probably going to be worse (and Maduro's better) than it would be if the US didn't take actions like declaring the situation in Venezuela an extraordinary and unusual threat to US national security.
Chomskyism is not the point. People don't need to even know who Chomsky is in order to blame the US or at least suspect the US is behind some plot against the Venezuelan government - and that's regardless of whom they blame for the shortages.
What you're not convincing me of is that there's some material negative consequence to the US of having the people who are already susceptible to believing the US is the problem believe it more.
Different people are susceptible to different degrees, and furthermore, they don't have to be susceptible to believe that the US is the problem, but a problem.
Some people may be in doubt about some of Maduro's accusations, but are more likely to buy them the national security threat stuff. Others probably believe Maduro's policies are a serious problem, but will also believe the US is another problem. Others will probably just shut up and stop criticizing out of fear of being called "traitors", because there will be more anger against the US than before. And so on.
But for example, Maduro's government was getting serious criticism from an increasing number of people
on the left, even supporters of what they consider to be Chávez's original ideas. That sort of criticism is particularly problematic for someone like Maduro. He may call them "traitors", but they may also call
him a traitor as well - or incompetent, etc.
Other people on the left are undecided between Maduro and his leftist critics.
Those are people already heavily against the US. Obama's move is likely to get leftists to support Maduro, even if for no other reason than fight a perceived common enemy (for example).
That aside, there is also the issue of regional support for Maduro. For the most part - there are exceptions - Obama's decision will reduce the chance of criticism of Maduro's oppression from other governments, or at least reduce the degree of criticism while including criticism of the US's decision in public statements, etc.