Assalam Alaikum Andaraawus, and good for you to be working through the document to build a detailed refutation of an obvious assault upon Islam.
The kind of material which presents any argument that Allah is in any way different from what we demand of ourselves in belief in the foundations is always to dreary and turgid to read through. I have little patience with merely reading such, little own building a sound refutation.
You might remember that example I posted in Islam Global Message of an early minimal attempt to build a description of Allah that was made as a small portion of a larger methodology for working with folk whom manifest an atheist self, but whom are believers in the wonder of science as miraculous. My own need has been to find better vehicles within modern English dialects for working with such folk. But after first encountering a translation of the foundations I regard such as the necessary matter to put into a modern English dialect, rather than any new beginning of trying to place into language what Allah is and is not. Truly we either already believe or we never will. But I have encountered individuals whom were so abused by persons claiming belief in God that they want to refute that they assume we mean by belief in One God. That was what motivated me. But the absurdity is that I knew that the document came to the attention of Hare Krishnas whilst I was assembling it, and so utilised their accidental knowledge of as an experiment with what they are able to believe within that structure. Sadly their small patch of what the whole of Hindu is, is that patch which went under the water, but well before they encountered what I wrote. I had detected actual nazis among them during the incident in which they made an enquiry of me, and seemed to misinterpret me so dramatically that it might as well have been entirely.
However, that told, it might interest you what I have commented elsewhere about the Vedic teaching in respect of there being three different modes of Human comprehension of One God. One dualist model and two non-dualist models. Using a simply lesson about what the three modes of comprehension are might help you refutation.
wasalam