Th 1:7,8 And to you who are troubled rest with us, when the Lord Jesus shall be revealed from heaven with his mighty angels, In flaming fire taking vengeance on them that know not God, and that obey not the gospel of our Lord Jesus Christ:
1Pe 4:17 For the time is come that judgment must begin at the house of God: and if it first begin at us, what shall the end be of them that obey not the gospel of God?
1Pe 4:18 And if the righteous scarcely be saved, where shall the ungodly and the sinner appear?
1Pe 4:19 Wherefore let them that suffer according to the will of God commit the keeping of their souls to him in well doing, as unto a faithful Creator.
It's an interesting question. To me, knowledge and obedience are like two legs walking. But also to me, the 'leading leg' or the first step is "knowledge". It's just that there is no 'walking' without both legs, and each step strengthens the next--knowledge produces obedience, obedience produces clearer knowledge.
What also strikes me in these verses is that "obedience" is to the "gospel of our Lord Jesus Christ" and to the "gospel of God". That certainly wasn't what I was taught way back when. Do Kennedy and Hagee know (understand) the "gospel of God and Our Lord Jesus Christ?" They have not a clue, though both are (or were) fine fellows.