God's mercy is great. Jesus went through his Passion, died on the cross, but he never complained or condemned anyone. On the contrary, he prayed for those who put him to death. Everyone, including the ones who hammered the nails through his hands and feet, can be forgiven if they only repented and believed. Jesus asked us not to judge anyone as he never did while on earth, always leaving open the door to salvation. But there will be a final judgment, for mercy with no justice served is not true mercy.