In the Monkey King Legend the heroes are warned not to overwhelm the monster by a reference to the Art of War by Sun Zi.
If I remember correctly, the translation is "even a rat will fight if cornered", though today we might mutter something about "asymmetric warfare" in response to "full spectrum dominance".
Sun Zi wrote in about 500BC. So it's not like you were warned yesterday. You've had 2500 years of warning.
Expect kamikaze attacks. They happen. Especially from people who feel they have nothing to lose, and feel under attack from very, very strong opponents.
But they don't. Not from the Vietnamese, nor the Indians nor are the Gabonese. Nor the Chileans and Nicaraguans, as was pointed out in the comment I originally responded to.
But they did from the Vietnamese, when the Vietnamese were occupied.
And try googling for "suicide attack India" or "suicide attack Kashmir" or "suicide attack Sri Lanka", you'll find plenty of hits.
Just because South Americans haven't done it (yet) (that we know of), it doesn't mean that it doesn't happen. Like I told you, you've had at least 2500 years warning.
Hell, there's even the American saying "Give me Liberty or give me Death!"
I have referenced academic study on this topic elsewhere, go read it.