There have been many attempts to refute the idea that the bacterial flagellum is irreducibly complex. Decide for yourself whether the critics are right or are blowing smoke by exploring the following articles.
Jonathan M., “Michael Behe Hasn’t Been Refuted on the Flagellum”
Casey Luskin, “Responding to Criticisms of Irreducible Complexity of the Bacterial Flagellum from the Australian Broadcasting Network”
Michael Behe, “New Paper on Flagellum Reveals Secret Obsessions”
Michael Behe, “From a 2011 Paper on Bacterial Flagella, Little Comfort for Darwinists”
John G. West, “Behe Critic on Bacterial Flagellum: No Intelligence Required Because ‘Natural forces work ‘like magic’”