"God of his fathers" is exclusively reserved to the Jew, I have given you a "Very Clear" explanation, scripture is provided.
The Holy Bible clearly describes the Antichrist Of Daniel as being a Jew.
Daniel 11:37 below clearly teaches that this "individual human man" will not regard "The God Of His Fathers", capital "G" the true Hebrew God, the "Antichrist" will be a Jew.
Daniel 11:37KJV
37 Neither shall he regard the God of his fathers, nor the desire of women, nor regard any god: for he shall magnify himself above all.
Daniel 11:31KJV
And arms shall stand on his part, and they shall pollute the sanctuary of strength, and shall take away the daily sacrifice, and they shall place the abomination that maketh desolate.
Matthew 24:15KJV
15 When ye therefore shall see the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place, (whoso readeth, let him understand
"Two Examples" of Biblical interpretations "God Of His Fathers"
"To The Hebrew Jew"
2 Kings 21:22KJV
And he forsook the Lord God of his fathers, and walked not in the way of the Lord.
2 Chronicles 33:12KJV
And when he was in affliction, he besought the Lord his God, and humbled himself greatly before the God of his fathers,
Daniel 11:36-45 is a prophecy of a willful king not a Jew who will not regard the God of his fathers. The king in Daniel's time was a Nebuchadnezzar, one of the many kings of Babylon beginning with Nimrod, the son of Cush, the Grandson of Ham, great grandson of Noah. Nimrod and those kings of Babylon never regarded the God of their Fathers and rebelled against God teaching others to follow their ways as they have continued to do so through all four Empires with the last one existing even today.