The Arminian/freewillers accuse Calvinists of being deceitful about this, and the Calvinists end up contorting the Arminian’s beliefs to deny it.

I hope you can follow me on the different definitions of “author.“
AUTHOR:
Definition #1: the originator, the ultimate cause.
Definition #2: the immediate cause, the actor, the one doing the action.
When the Arminian/free willers say, “your theology makes God the author of sin because you teach God has decreed all things,” they are referring to definition #2 (the immediate cause, the actor, the one doing the action) – While the Calvinist is referring to Definition #1 (the originator, the ultimate cause.)
The issue arises from different interpretations of the term “author” within theological contexts.
While one party aligns with definition #1 ~the originator, the ultimate cause~ when considering God as the Author of sin, the other party adheres to definition #2 ~the immediate cause, the actor, the one doing the action~, denying God’s Authorship of sin, this inevitably leads to confusion whereby those engaging in Theological discourse speak past each other and will never come to an understanding of the other.

