:: Who are we to judge? ::

It is prohibited for a person to say "such and such" is for Jannah or for Jahannam or that he is a kaafir.

The Messenger of Allah (peace be upon him) said: "There were two men who were living as brothers; one of them was sinful, while the other stove very much to perform his devotion to Allah. The striver (after good) would continuously see the other in sin, and so he would continuously advise him to leave it. 

The sinner retorted: 'Leave me, by my Lord- are you sent as a watcher over me?' 

Worshipper said: 'By Allah, Allah will not forgive you, or (he said) Allah will not make you enter Jannah. 

After their souls were taken, they were brought together before Allah, so He said to the striver: 'Did you have knowledge of Me, or are you able to do what is in My Hand?' 

Allah said to the sinner 'Go to Jannah by my Mercy and said to the other "Take him to the fire (of Jahannam)'. " 

[Abu Dawood Book #41, Hadith #4883]

Taken from The many danger of the tongue (http://www.kalamullah.com/five.html#shame)