Spicy food could kill you if you ate enough of the spicy food.
However for spicy food to be lethal you would have to eat several pounds or basically a big pot of spice food before it became lethal.
Your stomach will begin hurting from the spicy food long before you're able to eat enough spicy food for it to be deadly and kill you.
So while spicy food does have the ability to kill you if eaten enough of it it's really impossible to eat enough spicy food for it to be a problem.
Your body would stop you from eating anymore spicy food before you actually gotten sick enough from the spicy food to die from it.
Spicy food and Jalapeno peppers can also sometimes eat at your stomach lining if you eat too much of it as well so be careful.
Eating spicy food and Jalapeno peppers in moderation is okay but don't eat too much of it.