You're missing part of the equation. HRC is very popular with the Latinos. Obama is not. But JOHN MCCAIN can also get Latino votes. Translation - very big problem for Obama.
I don't disagree with you that Obama needs to reach out to the Latin American community. It will be easier to do when he is the nominee since he won't have another candidate attempting to undermine any gains he makes.
That's not a Clinton bash, the same would be true in the AA community with her if Obama wasn't in the race.