Opp is complete unknown, he just sat down, so he posts and minraises, i 3bet and when it gets to him he insta shoves.

I guess it's somewhat similar to yesterday when i squeeze w AK against a poster and he insta jammed.
Two differences, yesterday it was for full stacks, today for a half stack, plus the other difference is with AK yesterday that has good elimination cards against KK/AA whereas I didn't today.

Do you ever fold here?

$1/$2 No Limit Holdem
6 players
Converted at weaktight.com

Stacks:
UTG InMeITrust ($100.00)
UTG+1 Hero ($197.00)
CO Ray_Hollis ($247.69)
BTN Milo5592 ($177.30)
SB Leviathan_ ($303.40)
BB Truukjah ($252.35)
[InMeITrust posted $2]

Pre-flop: ($5, 6 players) Hero is UTG+1
InMeITrust raises to $4, Hero raises to $15, 4 folds, InMeITrust raises to $100

Final Pot: $118