This verse proves that Prophet Muhammd did not know the time of the Day of Resurrection. Why do you try to say that he did?!!
1.This verse never says that there is no difference between God and His Messenger. Because, the verse also says, 'And you[ O Muslims ] did not kill them, but it was Allah who killed them'.
Does this mean that there is no difference between God and Muslims?!!!
2.You said, "In the verse you quoted, God commands the Prophet to 'Say', I do not know."
You say that Prophet Muhammad was aware of the matter, but Allah orderd him to say to people, ' I do not know '. Do you mean that Allah ordered His Prophet to lie?!!! So sad. Allah says, 'Indeed, Allah does not order immorality. Do you say about Allah that which you do not know?'[7:28]
Good questions Mujtaba,
Knowledge is a Light from God. So, in this sense me, you and even the Prophet has no knowledge of Himself, because, that Light of Knowledge is not from us, but from God. So, no lieing. I already quoted the other verse that, even Muhammad threw, God said it was God who did. We cannot say God lied. But this only means, that, all things are from God, and it was though His will, that Muhammad threw. So, no lieing. This is just the way God Veiled the time of coming of Qaim, or Resurrection.
Now, let me give a logical reason too.
It is obvious that, Prophet and Imams are the most trust worthy. There is no logical reason God witholds this knowledge from them.
Now here are some more proof about knowledge of Imams and Prophet:
Selected from Imam Ali Sermon of Gulf:
But rejoice now for the cause of all creation reverts unto Me on the morrow. Let not this claim appear extravagant inasmuch as
We have been vouchsafed the knowledge of all fates and of all tribulations. and the knowledge of interpretation and of the Revelation and the decisive Discourse (Faslu'l-Khitab) and knowledge of all future calamities and catastrophes.
There is nothing whose knowledge escapes Us. This is truth and I shall see this One [pointing to Husayn, Peace be upon Him] when His Light shall flow forth of His eyes and I shall be present with Him a lengthy time that shall witness earthquakes and eclipses. They that are believers will revolt in His company from every corner. I swear by God! If I wished I would tell you of their names every one of them and their descent from both parents, until the Day of whose time is promised
.
I know of the wonders of God's Work what no one knows but God and I know what has been and what will be and what has been in the First Sprinkling with those who preceded the First Adam. All was disclosed (kushifa) for Me[8] and I knew and all was taught Me and I have learnt.
So hearken and do not raise a clamour. Were it not for My fear that you might say "'Ali has become possessed or apostatised from His Faith" I shall disclose unto you what and whereat they are and what you shall encounter on the day of Resurrection. All that knowledge was entrusted unto Me and thus I knew and the knowledge of all this was hidden from all the Prophets except the Lord of this Dispensation (Shari'ah)[9] of yours (Peace be upon Him and His Family). He taught Me His knowledge and I taught Him My knowledge.
I know all that is above the supreme Paradise and that which is below the seventh Ocean, that which is in the highest heavens and that which is between them and that which is below them
Selected from Imam Ali’s Sermon of Light:
O Salmán! Allahazwj, exalted be He, said: "He causes the Spirit to descend
upon His Servant He nominates." This Spirit then descends unto the one entrusted with the Command and the Decree. I (Aliasws ) give life to the dead. I know what is in the heavens and what is on the earth. I am, in truth, the Perspicious Book. I give life unto the dead and I have all the knowledge
that is in the heavens and on the earth. I am the Perspicious Book.
I also bring the Trembling and would cause the ‘final quake’. I am the ‘Protected Tablet’ (Lowhay Mahfooz) and all the knowledge it has originates from me.
My witness for the sayings of Ali is Quran:
http://lib.eshia.ir/search/"من_عنده_علم_الکتاب"?
See here also:
groupKey=eyJpdiI6IldRNzh4QXlrVGVHaTlxN0p2Tk9BMmc9PSIsInZhbHVlIjoiSWNQUzRXeW93eDdcLytJSVVvMkpJQXZGaWZTeWJoM2lua0RmcGxEM2NyeXBURDhZSWN5ajVlRW9Vd2VVbWxRMUFHQTJFSGgydFpFWkpkeXFOcE53aFlBPT0iLCJtYWMiOiI2Yzg2ZmUzZjkyMjVjZWFmYWY1OWMwMjk4MjBjM2Y4MmYyNWQ2MmQ4YjhlNDk0MWUxYWU1ZjQxMzZmMjE4MDk3In0=
http://lib.eshia.ir/27311/15/566/"الا_في_کتاب_مبين"