As usual you get all your information from some websites online without having ever actually read any of the books you're quoting and researched the historical events objectively. Otherwise the verdict of Islam is that it is enough to call a person a liar who simply repeats whatever he has heard.
Unfortunately for you, I can speak Urdu and the image you have shared - as though your revised printed books are hujjah upon me - says, "bimari ke waqt sirf ek hi lafz aap ke zabaan (na)mubaarak par thhaa aur wo lafz Allah thhaa".
Now, I will do with you what you do with the Qur'an and our books upon which you have no rights. The quote says that at the time of illness, there was only word on his tongue and that was the word of Allah (swt). That - to give you a dose of your own Qadiani buffoonery - does not prove that Mirza Ghulam Ahmad recited the shahadah when his soul departed his body as he was breathing his last while taking a dump. For the sake of argument, I will concede that Mirza had the word of Allah (swt) on his tongue (while he was ill), how does that prove that he recited the shahada when his soul departed his body?
Having said that, I will address a few points your "very intelligent and lovely" brother makes in this video. I found this video thanks to you because now I have that murtad's name.
In the video posted below, your "very intelligent and lovely" brother says that his father ensured that he had an Islamic upbringing. Then he reads from a script, the same tale we find in nearly all of the fake ex-Muslim videos on YouTube. Tamim says that while he was at a book stall, a man approached him and informed him about Imam Mahdi (as) prior to which he did not know anything about Imam Mahdi (as) or his prophesied coming. Sounds a lot like those (fake) ex-Muslims who say that they were pious, observing Muslims but did not know Jesus (asws) until a certain someone introduced them to him.
Secondly, Tamim - much like the fake ex-Muslims - says that he met the same man again who told Tamim that he was constantly praying for him *violins* Again, a lot like what almost every fake ex-Muslim says!
Thirdly, Tamim, at that Afghan forum, used to pass himself off as someone who was an expert in Arabic. Listening to his Arabic recitation, he sounds like a novice. And for someone who claims to have lived in Canada his entire life, his English - at best - can be described as "conversational" with a noticeable Afghan accent. This is important, especially the latter part, because a few members on that forum were convinced that Tamim is a liar who is on Qadiani payroll. Having watched this video (or I should say, heard to its audio), I am almost convinced of the same.
Lastly, Tamim says that he became a Qadiani when he found "proof" for the fact that Jesus (asws) "had died". Too much to ask from a blind, deaf and dumb individual like yourself (like the rest of your lot), but do you see the problem with that? Allow me to help you. Your "very intelligent and lovely" brother accepted Qadianism not on its merits or irrefutable proofs (though there is none) but because he, in his mind, substantiated the claim that Jesus (asws) "had died". For that to make Qadianism true (at best) is extrapolation. And the dishonest liar he is, he says in the clip that he was the least concerned with things such as where Jesus (asws) died, etc. He only wanted to know IF Jesus (asws) died or not. Well, the place of Jesus's (asws) death - if he was honest - is very important. How did he end up on Indian subcontinent?
To wrap up my winded post, if you see your "very intelligent and lovely" brother, tell him what the Afghan king said to Mirza Ghulam Ahmad when he (Mirza) tried to mimic the Prophet (saw) and sent a letter to him inviting him to Qadianism. The Afghan king replied with two words, "inja beya" translated "come here".