Did my opponent make an error here?

[Quercus]

On the bubble. Blinds are 100/200.

Button has 7BB. Hero is in SB with 4BB. BB and UTG share the rest.

Button is villain with KTo and raises 3BB.

Given my stack size, shouldn't he have tightened his range rather than attempting a steal in this spot? (Ignore his weird 3/7 stack raise.)

[bluefeet]

his only mistake was not open-pushing. KTo w/ 7BB's is an all-in from button.

[tigerite]

Correct..