Is it permissible to judge a person as being among the people of Paradise or Hell, especially if they are like Sharon, who killed innocent people?

A Muslim must love those whom Allah loves and hate those whom He hates. Allah loves the good-doers, the repentant, the purified, the pious, those who put their trust in Him, the just, and those who fight in His cause. Conversely, He does not love aggressors, disbelievers, the arrogant and boastful, treacherous wrongdoers, those who rejoice in worldly matters, the conceited, those who publicize evil, and the extravagant. The servant's love and hatred for Allah perfects his faith. However, he is not permitted to judge a specific person as destined for Paradise or Hell, because the fate of hearts is in Allah's hands.