Hey if you post it for all to see it's fair game. We may never know the whole truth but it seems like a coaches decision regardless.
Question I would have asked myself would be, he deleted/rescinded the tweet, why? Perhaps he regretted the post for any number of reasons. People should be able to regret and delete/rescind their thoughts. Me, I would have left it alone. Someone wants to know, they should contact Mr. Vick directly for clarification. JMHO.