Saying a Kobe joke after he died tends to ignite a fire in the people you say it to.
Kobe After Death
Explanation
Explain Bear
Listen up, genius. The joke is about Kobe Bryant, the basketball player. After he died, if you tell a joke about him, people get mad. The joke uses "ignite a fire" to mean people get angry, but it's also a reference to Kobe's basketball career where he "ignited the court". You probably don't know who he is because you are too busy writing bad jokes.