Honor your parents, as God commands. Right now your relationship with this boy is ungodly in every facet. He's not a Christian. He uses drugs. And it requires you to lie to and disobey your parents, and by doing so, disobeying Gods commands to honor your parents. Also, this is called 'missionary dating'. Dating someone with the hope of converting them. This is a dishonest practice and has no biblical backing of any kind.
A willingness to go to church means nothing, as many guys,or girls, will go through the motions just to keep someone.
Really, at this point, you are 100% in the wrong. The only issue i have not concerning you is the blatant racism your parents show. And if you believe they would kick you out over his race, that shows some problems as well.
But really you say 'he COULD turn out to be the kind of guy my parents want him to be'. But he might not. And taking him to church is not a guarantee. What you are doing now is rebelling. You have chosen a guy that you know will go against everything your parents are against. That's not a coincidence.
What if he continues doing drugs? What if he doesn't become a Christian? How long will you date him? Then is it loving to dump him if he doesn't conform to what you think he should be?
Sorry, but your relationship is a bad one from the start, even apart from the parent issue. God is not in any of this. Probably not what you were wanting to hear, but it's the truth.
I once made the mistake of dating someone not Christian. Now i look back and kick myself.