It doesn't make God the author of sin, and it doesn't make Judas a hero.
Calvinists clearly don't believe such things and reiterate it constantly. They DO, contrary to popular opinion, believe that humans are free moral agents.
Also, by definition God cannot sin, therefore, calvinists just trust that He is Holy and that sin and suffering are part of the pattern revealed in Christ.
God decided to save us in Christ. Therefore, God MUST HAVE FOREPLANNED the Death of Christ by Sinful Men to BRING ABOUT the salvation of men and the Glory of His Name.
Like was said by Joseph to his brothers, "You meant it for evil, but God meant it for good." Permitting sin by free moral agents, and using that inclination to bring about eternal salvation is NOT being the Author of Sin, but is instead being the Author of Eternal Life.
That is what Calvinists believe when they say, "Simply Trust God."
Free in their relationship to God. Sadly bound in what sin has done to them. God holds no one back. But they love darkness rather than light because their deeds are evil.
Sorry, this violates the I and the P.