I think he is trying to conflate the 6 year old bragging about shooting people with Kyle Rittenhouse “bragging” about overcoming an attempted character assassination, criminal charges, and successfully defending himself from those who intended to cause death or great bodily harm.
I belive he thinks Kyle Rittenhouse “bragging” about shooting (lawful self-defense) people is the same as the 6 year old bragging about shooting (attempted murder) his teacher.