I'm no laughing matter. But something there is that doesn't love my brother, so you dug deep to create me.
I'm food. I'm popular in Morocco. But I'm even bigger in Israel.
I'm a special kind of armament, which will help you propel an arm, better than just your arm.
What capital city am I?
The three clues are independent riddles; each has a different (and topically unrelated) answer, which is different from the answer to the question.
Second hint (for the third clue):
This is a Nahuatl-derived word.