I understand your point of view. Do you know that the most effective book against "Ahmadiyyat" was written by a great scholar Professor Ilyas Burni of Hyderabad in 1930s? Without this book many Muslims could have fallen into their trap. The Nizam had given him a huge prize.
Allama Iqbal had called Qadianis as traitors to Islam and India with very good reasoning. Even today they are busy maligning and hurting Islam, Muslims, Pakistan, Indonesia and the Mid-Eastern Muslim countries.
It appears, brother, that you have not read any of their books.
Please study my brief book HASHISH FROM QADIAN. http://drshabbir.com/library/hashish_from_qadian_5thEd.pdf