and, where did iran get all of these weapons to ship to venezuela from, exactly?

if the russians or chinese wanted to ship them weapons, they'd just fly them in.

and, why exactly isn't the united states intercepting this supposedly dangerous vessel?

bullllllshiiiiiiiiit.

https://www.politico.com/news/2021/06/10/defense-iranian-ships-venezuela-493189

as mentioned, the vessel is probably full of oil, and the oil is probably destined for houston. now, it seems as though we're going to ship weapons to iran, in return. which sounds familiar, doesn't it?