Regarding the controversy of Khatam-an-Nabuwwah Pir Mehr Ali Shah explains his point of view in such a way as to validate the claim of Hadrat Mirza Ghulam Ahmad of being a non-law bearing Prophet. Mehr Ali Shah writes:
میں کہتا ہوں کہ عیسی بن مریم کے بارہ میں بھی سب اہل اسلام کا یہی عقیدہ ہے کہ جدید شرع اپنے ساتھ نہ لائیں گے۔ بلکہ شرع محمّدی علی صاحبہ الصلوۃ والسلام کے مطابق حکم کریں گے۔ جب کہ قادیانی کا نبی ورسول ہونا خاتم النّبیّین کے مفہوم میں بباعث نہ لانے شریعت جدیدہ کے فرق نہیں لاتا تو عیسی بن مریم کا نزول ہمارے عقیدہ کے مطابق خاتم النّبیّین کی مہر کو کس طرح توڑ سکتا ہے۔
Translation: “I say that regarding Jesus son of Mary, all of the people of Islam have the belief that he will not come with a new Shari’ah. Rather, he shall rule in accordance to the Shari’ah of Muhammad peace and blessing be upon him. When the Qadiyani being a Nabi and Rasul [Prophet and Messenger] does not make a difference to the meaning of Khaatam an-Nabiyyeen as a result of him not bringing a new Shari’ah, so how can the descent of Jesus son of Mary, according to our belief, break the seal of Khaatam an-Nabiyyeen?”
*Note: Mehr Ali Shah, in attempting to justify the belief of the second coming of Jesus son of Mary as not violating the Finality of Prophethood, has inadvertently validated the very claim of Hadrat Mirza Ghulam Ahmad of being a Prophet but without a new Shari’ah! He is saying that his and the people of Islam’s belief concerning the second coming of Jesus does not break the Seal of Khaatam an-Nabiyyeen because Jesus will not come with a new Shari’ah, similar to how Hadrat Mirza’s claim of being a Prophet but without a new Shari’ah does not break the Seal of Khaatam-an-Nabiyyeen.
In fact, Mehr Ali Shah goes on to write that not just Jesus, but every single previous Prophet can return to this world and it would not make any difference to the belief in Khatam an-Nabuwwah:
مگر چنکہ آنحضرت صلی اللہ علیہ وسلم کے دنیا میں تشریف لانے سے پہلے ان کو ملا ہے لہذا خاتم النّبیّین کی مہر کو اگر سارے انبیاء درنیا میں آپ کے بعد آجائیں تو بھی نہیں توڑ سکتے۔
Translation: “Because the previous prophets received [their prophethood] before the Holy Prophet [Muhammad] Sallallaho alaihi wasallam came into the world, therefore if all the prophets were to come into the world after him [Sallallaho alaihi wasallam] it would not break the seal of Khaatam-an-Nabiyyeen.”
*Note: What Mehr Ali Shah has essentially stated is that the coming of any number of Prophets into the world, including all of them, does not affect or break the Khatam an-Nabuwwah so long as those prophets received their prophethood before our beloved Prophet Muhammad (Sallallaho alaihi wasallam). However, the dilemma remains that why can only a previous prophet come and not a new prophet – since Mehr Ali Shah has not explained the wisdom or logic behind his rudimentary and semantic explanation of Khatam an Nabuwwah which only precludes the coming of a new Prophet but not a previous Prophet – although the result in both cases is basically the same that a Prophet comes into the world, receiving revelation acting as a Prophet after the passing away of Prophet Muhammad (Sallallaho alaihi wasallam).
Reference: Saif-i-Chishtiyai; p.22-23