Complex sentence: The film has been criticized for making Cromwell appear to be too heroic, and for leaving out all mention of the Cromwellian conquest of Ireland, though the actor who played him, Richard Harris, is Irish himself.
Split into simpler sentences: The film has been criticized for making Cromwell appear to be too heroic, and for leaving out all mention of the Cromwellian conquest of Ireland. Ironically, the actor who played him, Richard Harris, is Irish himself.