we will have developed TeChNoOlgy that will destroy this Meteror
If the meteor is already on coarse to contact with earth, we won't be able to destroy it. If we attack it in any way, it will break into smaller bits, making smaller impacts scattered across the earth, making it that much worse.
We'd have to pull it away from the earth's gravity, somehow.
Anyway, people who believe in 2012 being earths demise are idiots. All the proof you have is a Mayan calendar you can't even trust, and a couple of supposed 'predictions' from your Bible.
Really, now.
Really.