Dennis Rodman -- Regrets N. Korea Trip ... I'm Not the Devil!

Dennis Rodman now knows what we all figured out from the beginning ... his trips to North Korea were NOT a good idea.

Rodman appeared on ESPN today where he was brought to tears when talking about the negative reaction he received following his visits with Kim Jong-un ... particularly the time he sung the man "Happy Birthday."

But Rodman said he believes that one day he will be vindicated and that relations with North Korea will improve, and when they do, "Watch all these people kiss my ass."