Mr Cahill seems to err in a number of main areas, as documented below:
1) Where he is obviously ignorant about what Calvinism teaches e.g. he seems to be unaware that Calvinism believes that man has a will that chooses and is responsible for its actions.
2) Where he attributes things to Calvinism which it does not hold. e.g. that the call to repent in Matthew 4:17 is addressed only to the elect.
3) In his salvic application of his disagreements – if Calvinism is Galatians 1 ground (as he claims at the end of his article) then he has just damned in hell many of the greatest Christians who ever lived, including many of the translators of the KJV, Spurgeon, Whitefield, Jonathan Edwards etc., As I point out, if he is wrong (the “if” of argument, not of doubt) then he damns more people than Calvinism was ever supposed to do. (Although Calvinism only damns those who will not believe and no one else.) There’s More