Will it really matter when drumphy doesn't care what agreements he overrides?
It won't matter to Drumph - but it will matter to the rest of NATO... and it will impact on how they respond... and it is likely to matter to some of the Drumphettes advising....
Pretty much nobody (except other fascist dictators) liked Maduro - most Venezuelans hated Maduro - and there were no complicating major military defence alliances... And as has been clear for a long time, Trump and co completely disregards International Law. So some downside in terms of international soft influence... but the USA under Trump has already completely trashed the US reputation - nothing to lose there!
An invastion of a NATO member by default declares war on the invader by all NATO members. That is the underlying principle of NATO - the question is, what if the invader is themself a NATO member?
Regardless of the answer to that question - the complications with invading a NATO member are several orders of magnitude greater than those of invading a standalone South American dictatorship.