Boy that does not seem right.
Amongst reservists I know in eastern NY, they all seem to like Trump. Officers, NCOs, white, hispanic and black who express and opinion like him. Of course perhaps those that do not like him keep quiet, but overall it seems he is very popular.
Obama was popular with most Hispanics and most blacks so perhaps it is just the folks in the reserves tend to support whomever is in power.
Anyway that poll does not seem accurate.