Conquest of Mecca

Question:

Was the prophet wrong to conquer
Mecca and make everyone convert to Islam? Is there any unbiased, trustworthy historians that tell the correct truth? Because everybody seems to think Muhammad forced people to enter Islam 'by the sword'.

Reply:

The Prophet had to re-take
Mecca in order to cleanse the House of God (Kaaba) from the idolatry that was practiced there.
However, when he re-took Mecca, he did not force anyone to convert to Islam.
If there are any sources that claim that Muhammad forced people (by the sword) to accept Islam, they are lies against him. The evidence we have is given in the Quran.
Muhammad could not have done so simply because God commanded him very clearly in the Quran that there shall be no compulsion in religion and that he (Muhammad) does not have the authority to force anyone to believe:

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There shall be no compulsion in religion. Correctness has been clearly distinguished from error, so whoever rejects false gods and believes in God has grasped the strongest bond that will never break, and God is Hearer, Omniscient. 2:256

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Had your Lord willed, all the people in earth, in their entirety, would have believed. Are you to force the people into becoming believers? 10:99

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Say, "The truth is from your Lord, so whoever wills shall believe and whoever wills shall disbelieve. 18:29

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So remind, for you are but a reminder. You are not a controller over them. 88:21-22

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For you is your religion, and for me is my religion. 109:6

These are the Quranic words, so it is up to us to accept them and exonerate Muhammad from what was claimed against him, or stick with what un-Quranic sources claim.
As for the second part of your question:

<<<<Is there any unbiased, trustworthy historians that tell the correct truth? Because everybody seems to think Muhammad forced people to enter Islam 'by the sword' .>>>>

Let us get to the heart of the matter:
Do you believe that the Quran is the word of God?
If you do, then you do not need any historian because God tells us in the Quran what He commanded Muhammad to do (see above).

As per the Quranic words above, we know that God commanded Muhammad not to force faith on anyone. As a result, we find ourselves faced with a situation where we must choose one of the following two options:

1-
That Muhammad disobeyed God, and that during the conquest of Mecca, he forced people to enter into Islam.

2-
That Muhammad, being the obedient servant of God, obeyed God's law and never did compel anyone to enter Islam by force.

For those among us who believe the words of God in the Quran, the only option is to believe God's Quran and to uphold the integrity and sincerity of Muhammad. If we do, then we would not need the verdict of any "
trustworthy historians" for the word of God suffices us:

Who is more truthful than God in utterance? 4:122