You can tell her that she is no longer Muslim by following this sect! By marrying him, she is not in a marriage but rather in Zina.

I have a cousin who is going to marry a guy from Ahmadiyah sect. According to me, they are not Muslim and I spoke to her about that but unfortunately she does not want to return back from Tawheed. She start following this sect completely. Can you plz give me some advice how I can convince her to return back to Tawheed

Apostasy, Sects | March 4, 2017 4:35 am
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A barelwi sufi scholer insults the people of sunnah and he says we have a incorrect version of islam. And he labells people as devient. And he says something about the wahabi sect . Is there really a sect callled the wahabi school of thought? pleas clarify
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One Of My Uncles Said, ‘Whoever never Participate in Thablighi Jamaath (Dhahwa)they Can’t See Rubbul Izzath’s Face,’ The Question Is If I Never Participate To Thablighi Jamath, Can’t I See Allahs Face ?