If we really had to shoot someone dead during a memorial ceremony, it definitely couldn't be with a machine gun sweep. Even if Gao Yang were given a hundred guts, he wouldn't dare.
Using a machine gun might be exhilarating, but if anyone else got hit by mistake, and it could be anyone, Satan would have no future.
Of course, even killing just Mario would have extremely serious consequences, but it's clear from the setting how severe the aftermath would be.
However, no matter what, Mario definitely has no official duties, so killing just Mario without injuring others is a result that can still be borne. But this is just an estimation.
So if there's an opportunity to shoot Mario, an assault rifle is impossible, no need to think about it, and a machine gun is even more impossible, which leaves only snipers.
Satan currently has three snipers, and Gao Yang thinks that as long as any of the three can find an opportunity, they can definitely kill Mario.
