Ortega embarrassed Kerry when he took the Soviet money in flagrant contradiction to his letter where he promised he wasn’t a commie stooge. I don’t think that was part of Kerry’s plan.
"After being transferred out of combat duty, Kerry was restationed in New York in early 1969. By late 1969 his older sister Peggy was already involved in the antiwar movement, working for the Vietnam Moratorium Committee (VMC). That October, she recruited John as a pilot to fly Adam Walinsky, a key leader of the New York office of the VMC, to VMC-organized antiwar demonstrations. Kerry, who was still on active duty in the US Naval Reserve, later boasted that he had been smart enough not to put down Moratorium on the Navy signout sheet for that Tuesday and Wednesday."
http://www.freerepublic.com/focus/news/1241847/posts
Here are a couple of photos of the Vietnam Moratorium Committee (VMC) in action...