Excess taxation has sometimes been used by some despotic ‘Muslim’ leaders, but mainly it has been applied fairly to non Muslim subjects. History testifies that non-Muslims paid less tax. Since they enjoyed the protection and benefitted from Muslim rule, it is only right that they contributed by way of fair taxes.
The Jews of Khaybar are an example of latter Muslims trying to justify their own unlawful and un-Islamic practices and make up history to give this ‘legitimacy’. Mistreat Jews, say the Messenger did it and write forged hadith to ‘prove’ it, and then have ‘historians’ use these fabrications to record the ‘history’! This method is used by all peoples; ‘History belongs to the victors’.