Honestly its rude to be invited by a country to meet their president who decided to respond to your criticisms of their administration only to not show up and go meet the opposition.
Being invided and then no showing shows complete disregard to basic diplomatic Etiquette since it was a mission to show solidarity against the embargo
Bonus socdems being cringe part 4.5: about another member that didnt show up to the presidential meeting
Deeply unserious people
I genuinely don't think they actually thought through any of this. They've treated it like it's some school trip where a class gets to meet the prez and say a few words. Not as a real and serious political organisation trying to make ties that will benefit their cause.
Would they behave this way with the UK? With Norway or Sweden? Countries that wouldn't give them the time of day and wouldn't support them? Would they offend them with criticisms of how they run their states if given any kind of diplomatic welcome? I somehow think they wouldn't. They'd treat it like a westerners day out.
They went there to lecture them. Imbeciles. A country that in the past has not been against literally arming their allies in foreign nations. Let alone providing lukewarm resource support.
Just incredible shortsightedness. These are people you should be building trust with to eventually reach the point of collaboration.