Indeed I would not disagree with you that your knowledge and understanding and limitation on the deduction analysis and analysis of writing is very poor. You fail to understand what the writer is trying to say when he says “By mentioning his name all other prophets are implicitly included.” Where does he state explicitly Hadhrat Mirza Ghulam Ahmad (A.S) only? What I understand from the statement is that he may be trying to say that when you recite Kalima and say Muhammad ur rasoolullah you also affirm that you also believe in all the Prophets who were before Holy Prophet SAW and after.
The faith was not originated by this writer or this book is not the basis of Jamaat Ahmadiyya. Hence in last I would say that I have made my points and told you that we recite the same Kalima as any Muslim does. I dont have anything further to add to this subject.
You are most welcome to believe whatever you want to but you will be considered ignorant. How can you come and tell me that for example that I am eating apple when I am actualy eating orange? Ignorance!
P.S - I asked you to give me the page number of the extract but you never gave that. How do you expect the readers to read when you dont provide the full reference? Too late now!