That would be requiring them to prove a negative which in most cases is not possible.
That’s clearly a false claim and has been pointed out as such every time you’ve made it. Not being able to prove a negative is a principle of folk logic, not actual logic. You’ve clearly ignored the previous responses to the false claim that you’re again making above, as is your prerogative.
Give an example of proving a negative.
I did concede that I can prove there isn't an elephant in my house.
That's correct, absence of evidence where evidence should be found is evidence of absence. The problem lies in assertions such as "prove there is no God," where there is no evidence, but unlike an elephant in the room, it can't be proven.
