100 + 10 MTT - UTG limps, reraises

[Rednax]

700 entries, not sure how many left, blinds 25-50. Villain and I both have about 2500, MP caller has about 2000 I think and LP caller 1800. MP seems a little loose, no other reads.

Villain limps UTG, I raise to 200 from UTG1 with JJ, and get MP call and LP call. UTG now goes allin. Was my original raise appropriate? And what do I do now?