Mate, you aren't getting the point.
The formal reason why Venezuela has been sanctioned is to stop oil getting to Russia.
The other guy is pointing out that the sanctions are only being enforced by America because Trump has personal beef with Maduro.
As soon as Putin requests (orders) the blockade lifted then Trump will do so.
Trump does not give a shit about Ukraine.
It might be the other way round, but even oil producers buy oil