/u/shlin28 has a few views on this
https://www.reddit.com/r/AskHistorians/comments/1c4p2p/is_there_historical_doubt_of_the_historical/
the historical doubt article seems especially good with comments by others like /u/yodatsracist .
And Tom Holland himself briefly talks about his reception to his work in his history of byzantium podcast interview here http://thehistoryofbyzantium.com/2014/11/06/episode-57-why-did-the-arabs-win-part-2-in-the-shadow-of-the-sword/