I'm not aware of anything in the trial record that would support that interpretation. There will always be a question about what happened when Martin confronted Zimmerman. We have Zimmerman's account, but without any other witnesses, there is no corroboration. It is certainly possible that Martin said something to escalate the encounter, but there is no evidence of this. Nor should one speculate based on Zimmerman's mixed record since the trial. Based on the evidence available, self-defense was the only verdict an impartial jury could have reached. Indeed, Zimmerman should never have been charged. The initial judgement of the local police and prosecutors to treat the case as self-defense was correct. Charges were only brought belatedly as a political response to mob pressure, and the jury was correct to find for Zimmerman.
It's not what Martin said, it's what he did that got him killed.