He has stolen five out of five times and seemed really spewy but how does this get affected when being 24bb deep against the SB?

PokerStars - $3.19+$0.31|200/400 Ante 50 NL - Holdem - 9 players
Hand converted by PokerTracker 4

UTG+1: 5,330 (VPIP: 14.12, PFR: 12.42, 3Bet Preflop: 6.90, Hands: 347)
MP: 3,170 (VPIP: 11.54, PFR: 7.69, 3Bet Preflop: 0.00, Hands: 26)
MP+1: 4,932 (VPIP: 50.00, PFR: 41.30, 3Bet Preflop: 21.74, Hands: 47)
MP+2: 12,443 (VPIP: 15.79, PFR: 13.07, 3Bet Preflop: 6.52, Hands: 344)
CO: 8,361 (VPIP: 12.73, PFR: 11.06, 3Bet Preflop: 8.98, Hands: 1,660)
Hero (BTN): 10,645
SB: 9,563 (VPIP: 25.33, PFR: 14.08, 3Bet Preflop: 8.57, Hands: 75)
BB: 2,912 (VPIP: 18.15, PFR: 14.83, 3Bet Preflop: 4.65, Hands: 281)
UTG: 7,000 (VPIP: 18.29, PFR: 17.55, 3Bet Preflop: 14.75, Hands: 581)

9 players post ante of 50, SB posts SB 200, BB posts BB 400

Pre Flop: (pot: 1,050) Hero has Q T

fold, fold, fold, MP+1 raises to 4,882 and is all-in, fold, fold, fold, fold, fold,

It seems to be a relatively marginal +EV spot so it does not worth exposing a 25bb stack.

Unless the maniac is shoving something like 60% and the SB is only over calling around 6% I would fold since we get crushed when the SB wakes up with a good hand.

I believe you need more hands/history vs MP opponent to justify the ISO.

pretty standard fold here