as a matter of law, YES.
Read the law, read the instructions. They are very clear.
It's all about zimmermans reasonable fear. If he had a reasonable fear - not guilty. If he had no reasonable fear, guilty.
The following trayvon around stuff is relevant in as so far as to prove state of mind with regards to 2nd degree murder and whether he had ill will, hatred, or spite.
But none of that, as a matter of law, inherently negates a self defense claim. It's very clear, if you are not doing an unlawful(not ill-advised, not bad decision making, not over the top bravado, not standing on a sidewalk, not getting out of the car) activity, and you are attacked, you can claim self defense if you believe you have a reasonable fear of grave bodily injury or death, or to prevent a forceable felony.