That is of course the point, we dont decide which points are from god and which are not, it is not for us to judge. we take the quran, and use it as gods last revelation, his last testemant. Where they contradict the quran superceeds, because it is the last and gods actual word. now for the better parts of my arguement. The books of the bible were written at seperate times and collectivised. The revelation to john, when given to him he wrote the scripture and it is one of prophecies for the day of judgement, and not a guide as most of otehr scriptures are meant.
This is the kjv translation:
rev 22:18 "For I testify unto every man that heareth the words of the prophecy of this book, If any man shall add unto these things, God shall add unto him the plagues that are written in this book"
The english translation here has been changed to say book, rather than scripture. We know that the books of the bible arent in chronological order, but revelation is included last in the collection to make people believe that it is refering to the entire bible, (this is an example of how christians have adapted the bible to suit them). If you read it in the original signs its written in you will note that the word originally used is "scripture" and is not refering to the bible, but rather this revelation for the day of judgement alone. so it should read:
'For I testify unto every man that heareth the words of the prophecy of this scripture, If any man shall add unto these things, God shall add unto him the plagues that are written in this scripture'
Even if you do translate the word as book, the bible as a collective like now didnt exist at the time of this revelation, and so the revelation would have been the 'book' as thats what it was - a book of revelation. Simply by looking at the entire verse in context we can see that john is talking only about his revelation.
psa 119:89 'LAMED. For ever, O LORD, thy word is settled in heaven'
This is not saying the bible will be around forever, rahter god will always give us his word to follow.
Isa 40:8 'The grass withereth, the flower fadeth: but the word of our God shall stand for ever'
Again this is not saying the bible will be around forever.
Matt 5:18 'For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled'
Mattheew 24:35 'Heaven and earth shall pass away, but my words shall not pass away'
Neither of these go far enough to establish that it will be the bible that will flourish forever, rather just the words of god and his law, which we still have today under the qur'an.
1ptr1:25 'But the word of the Lord endureth for ever.'
Again gods word will be around forever, and the word of the lord is not the same as the book that contains it, the second part of that, this can again be attributed that god will give us ways of ensuring we know his word (through prophets and books). If god actively prevented people from changing his word he would be inhibiting free will, which is what he gave us in the first place to test us.
To challenge your last points about the trinity in the torah, give me the book, chapter, and the verses and ill show you how you are being biased in your thinking.
And by the way there is no need for you to bless my search for the truth, i was a church of england christian, but now ive found the truth, and inshallah (with the blessings of god), your search will soon be complete too.