Exactly what he Said right there, A Muslim can't even Judge another Muslims, It's all up to Allah at Judging People EITHER if they're going to Hell, Or Heaven.
And as Allah said.
(Say: O My slaves who have been prodigal to their own hurt! Despair not of the mercy of Allah, Who forgiveth all sins. Lo! He is the Forgiving, the Merciful. (53) Turn unto your Lord repentant, and surrender unto Him, before there come unto you the doom, when ye cannot be helped.)