Kid who listens to shitty metalcore, most likely wll start a band with other kids whose parents bought them Mesa dual rectifiers and $2000 drum sets.
Lyrics are usually dumbed down to mix with the breakdowns and two-step parts of traditional metalcore.
A christcore kid is basically a kid who wants to be in a metalcore band, but doesn't want to make his/her rich parents look bad. He/she totes on about Christ, with a "metal" spice when all he is doing is looking like an idiot and spewing bullshit in order to lure in dozens of post-teenage girls to their 'intense and inspirational' display of faggotry.
Typical christcore breakdown:
*cue stage pile
"SHOW ME YOUR FAITH!!!1!" (china crash) CHUGGA CHUG...CHUG CHUG CHUG CHUGGA CHUG...