From the article, look what Powell thinks of him:
Update: wow, look at what CNN's reporting about the right wing social media nuttiness of Flynn's son, who works closely with Dad.Colin Powell wasn’t pulling punches.“I spoke at DIA last month,” the former secretary of state wrote
in a hacked email released this summer. “Flynn got fired as head of
DIA. His replacement is a black Marine 3-star. I asked why Flynn got
fired. Abusive with staff, didn’t listen, worked against policy, bad
management, etc. He has been and was right-wing nutty every [sic] since.”
Update 2: perhaps Flynn won't accept, because there are some real issues with his on line behaviour. In July, the Jerusalem Post reported:
The former general– who GOP presidential nominee Donald Trump considered for his running mate, and who last week delivered a primetime speech to the Republican National Convention– was responding to accusations by the Clinton campaign that Russia was behind a hack of the Democratic National Committee, and a subsequent leak of e-mails, in order to help Trump's candidacy.
Flynn wrote that "the corrupt Democratic machine will do and say anything" to get Clinton elected. "This is a new low," he said, retweeting a message that read: "Not anymore, Jews. Not anymore."
He has since apologized for the retweet, calling it "a mistake."