"Disgraceful" is the word for it, if not despicable. One could pretty much regard the CBC as an adjunct of the Castro government.
Apparently they were visiting a center dedicated to Martin Luther King when they were invited to see Castro. They should have said thanks, but no thanks.
All one need do is look at their voting records and their past associations and activities. One of the men was called “red” Dellams because he was so far to the extreme left. I’m not talkng about your garden variety liberal but real socialists and far-leftists.