Qadianis say that Mirza Ghulam Qadiani debated and replied to Christians and Hindu Arya Samajis to defend Islam and prophet of Islam pbuh. In this way they make a false propaganda that MIrza sb was a great debater and servant of Islam.
However, the real intent behind his debates with Cristian can be understood with this reference from the book of Mirza sb. On 27 September 1899, he (MGQ) wrote a letter to British Lieutenant Governor, Punjab wherein Mirza sb has broken all records of flattery and tendered his apology for replying to christians in harsh language and termed his harsh language a strategy to cool off the sentiments of muslims of India. This letter is incorporated in Anjam-e-Atham and in Rohani Khazain Vol-15 pages 487 onwards.

Mirza writes that “I have been writing for 20 years in the english Arabic, Persian and Urdu that it is the duty of Muslims to be true well wishers and loyal to British Govt and leave the stupid Idea of Jihad (Nauzubillah) and don,t be ungrateful to this Govt.
That i debate with peoples of other religion with good intentions and admit to have use harsh language against them because some Christian newspapers like Risala Noor Afshan Ludhiana publish writings against our prophet pbuh. When I read these writings it came to my mind that Muslims would get provoked and react to this ferociously. So in order to defuse their savage feelings I thought it to be appropriate to reply to these writing in little bit harsh language. Hence following this conscious strategy, I wrote some books in harsh language so that their savage feelings could be cooled off and there may not be an issue of law and order.
I would request My Qadiani friends to think whether a prophet can be so apologetic and make such flattery of British Govt. Moreover Mirza sb was doing hypocrisy to Muslims