You make it sound like Ho and Mao were bosom buddies. They weren't. Read Vietnamese history. The overall theme was the paranoia the Vietnamese had over being conquered by the Chinese again. Notice that when the Vietnam war ended that the Chinese and Vietnamese had a number of battles on their border. No, I'm not crazy about Vietnamese (or any other type) of communism but they did keep China out of Southeast Asia. We acted under the illusion that they were all a solid front.
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Qut telling me I said things I didn't say. I know the battle separating SE Asia from the Cinese from the 900s. Actually, the liberation from China was accomplished not so much by successful battle, but because the climate and disease were so horrible that the Chinese found the area too worthless and inhospital to occupy. The area was avoided by everybody except the indiginous population until it was found it could meet the increasing need for rubber.
That having been said, An American defeat would be enjoyable by both Ho and Mao, regardless of any personal dislike between them. They were entitled to their opinion of Kennedy's stupidity, and expressed it with some joy.