some questions about calling small stack pushes late

[Semtex]

I've been observing some of the winning regs at the 16s and 27s to see if they are doing anything radically different from me to merit my low ROI and have concluded that they have 15% ROIs while mine is around 5% because I suck at racing on the bubble and ITM. All joking aside, one thing I was noticing today from a 15% winner was his loose calling of short stacks late, which I stay away from. Here is an example:

PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (4 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

SB (t1750)
BB (t3765)
UTG (t7105)
Button (t880)

The player in question is BB, and he called the button's push with like J5o or something. There were other hands where it was still 6 handed and he was calling UTG pushes from people who had 4ish BB with the same trashy hands. He is priced if its going to be a 60-40, but isn't calling off a quarter of your stack with what will probably be the worst hand bad in these spots?