بسم الله الرحمن الرحيم
'Qadiyanis' are Not Muslim
 
We need to have an awareness of the deviation of Ahmadiyya because, as well being known as Ahmadis or Qadiyanis, they also call themselves "Muslims"!  So the danger is our youth may stumble into their websites, satelite TV channels (e.g. MTA - Muslim Tv Ahmadiyya) or SmartPhone Apps and trust their information thinking it is Islāmic.  
 
Ahmadiyya was founded by a man known as Mirza Ghulam Ahmed Qadiani who claimed that the last Prophet is not Muhammad (sallAllāhu `alayhi wasallam) and that he (Mirza Ghulam) was another prophet!  As we (Muslims) should all know, whoever makes such a claim or believes it then they are not Muslims (they are kuffār).
   
Allāh said: "Muhammad is not the father of any man among you, but he is the Messenger of Allāh and the last (seal) of the Prophets" (al-Ahzāb 33:40).

And the Messenger of Allāh (sallAllāhu `alayhi wasallam) warned us that a number of liars (thirty) would emerge, each claiming to be a prophet (see Saheeh Al-Bukhārī: vol. 9 book 88 no. 237 and vol. 4 book 56 no. 806.  Also Saheeh Muslim: book 41 no. 6988).
 
There were liars claiming prophethood before Mirza Ghulam (e.g. Musaylamah) and more will follow until the ultimate liar, ad-Dajjāl, appears.  We seek refuge with Allāh.