We can't know the heart or intent of Jimmy Swaggart, only God knows that.
We can pray for discernment, in order to know if we should, or, how closely we should adhere to any ministers teaching.
If we pray for discernment, God will reveal
to us, whether or not, the truth is being preached. A Godly man will be seen in his righteousness. A wrongful man, even in sheeps clothing, and by his example, will be revealed to those seeking the truth.