So if they weren't written by Paul, yet claim to be written by Paul, forgery, they are still Inspired by God?
There are people whose motive can be to call God's word into question, and so they are claiming Paul did not write letters that he did write.
If I am a follower of Jesus, I would be lying to say I am Paul writing a letter he is not writing.
So, if someone claims Paul did not write one of his letters, it can be the person is accusing the writer of being a liar.
But one motive can be to discredit certain things our Apostle Paul has written. If you really know what various people are saying about Paul, you know there are ones trying to discredit things that are said in those letters. So, one way to bring doubt on what he says is to try to make it seem like he did not say certain items that these people disagree with.
And by misrepresenting some things, in his messages, you can make it seem like they contradict. There are people who do this, between Paul and James, by the way > they misrepresent James, then say he does not agree with Paul.
This is not a new trick. In apologetics debating, ones can misunderstand something God says, and then deny what God's word does not even mean.
Ones are denying things Paul says about wives submitting to their husbands, and they are denying what he says in relation to slavery. But they misrepresent what God's word means.
So, if you know these people and what they are saying, you might see if the letters they deny are ones with Paul's items about slavery and wives being subject to their husbands. By denying his authorship, they can be conducting a back-door attack on things he says about wives submitting to their husbands and about slavery.
And there can be other things. There are ones who deny the letter of James, claiming it is inconsistent with what our Apostle Paul has written.
However . . . in my opinion . . . every letter that Paul has written fits with James and all of Paul's other letters.
Plus, of course, the writer of Hebrews does not name himself . . . or herself. But in case Paul wrote this message, ones trying to prove who else did it can not do this, actually . . . if it was not someone else!
And so they can go on and on, trying to do what can not be done.
By the way, Paul and Silvanus and Timothy say that after they ministered to the Thessalonians, the Thessalonians could so well spread God's word, that Paul and Timothy and Silvanus did not need to add anything to what the Thessalonians said, if Paul and Silvanus and Timothy went somewhere the Thessalonians had already been ministering. So, this might mean any of those Thessalonians could also write as well as Paul . . . and Silvanus and Timothy; except, I am satisfied, they would not lie by saying Paul wrote what they wrote. 1 Thessalonians 1:8
And it does not matter if "many" deny Paul. Jesus does say many will be deceived, right? So, what is the real motive behind this? Where is this calling attention?
How much is this helping people's attention to the main focus of our Apostle Paul's ministry and message?
"Him we preach, warning every man and teaching every man in all wisdom, that we may present very man perfect in Christ Jesus. To this end I also labor, striving according to His working which works in me mightily." (Colossians 1:28-29)
How much are these "many" scholars doing to help you to become perfected in Jesus and how Jesus has us loving as family while caring for any and all others?
"Let all bitterness, wrath, anger, clamor, and evil speaking be put away from you, with all malice. And be kind to one another, tenderhearted, forgiving one another, even as God in Christ forgave you." (Ephesians 4:31-32)
"And walk in love, as Christ also has loved us and given Himself for us, an offering and a sacrifice to God for a sweet-smelling aroma." (Ephesians 5:2)
Paul is all about Jesus; yet some number of so-called scholars can be very much about Paul, for him or against him. And ones can get themselves isolated away from Jesus, with attention mainly to studying and arguing about Paul's message.
But God has us discovering all He has for us . . . in sharing with one another who are His children . . . not in isolation with a bunch of books and arguing. And now He gives us
"examples" whom we can know personally, so we can feed on the example of His approved leaders >
"nor as being lords over those entrusted to you, but being examples to the flock." (1 Peter 5:3)
So, beware of getting too busy with reading stuff of people you don't even know personally. If they claim Paul did not write his messages . . . for all we know, these people are not who they claim to be!! Discover and get to know God's
"examples", so we can know what He means by His word.