Satan is the author of evil, but God 'authored' Satan's existence and therefore blames Himself, per Isaiah 45:7's Hebrew.
Satan's strategy is exhaustingly displayed in Bible, so you can test a human thing for whether 'satan' is behind it. Chances are, he is. Chances are, the more noble and moral it looks, the more satanic it is.
So how to tell? Well, you can prove anything Satanic (versus merely evil) by two testing devices: A. Is it Anti-semitic? B. Does it Belittle Bible using Matthew 4:3, 6, 9 'tactics'? If 'yes' to both 'A' and 'B', then baby -- you're looking at something Satan sponsors.
Parts 2 and 3 of my KJVOB 'declaring war' preface go into the anti-semitic games Satan plays. Links are here:
Part 2: youtube.com/watch?v=STjRfvbeO3E
Part 3: youtube.com/watch?v=oMTCwfgDyCU
Satan's use of first Church, then Islam, to herd and kill Jews is traced in 4 video parts. 1st part link: youtube.com/watch?v=Uk-MIH7IvTg . Be sure to view its video description, which links to webpages where a fuller explanation is given.
Test Matt4:3,6,9 on you-name-it popular 'doctrine': and you'll find the verses are actually used to craft the core 'doctrine' which is POPULAR. (True Bible Doctrine is never popular, but instead popularly CONTESTED.)
Also test any translated Bible verse which seems fuzzy, contradictory, 'mean', wrong, etc.: and again, you'll see the same three tactics. It's uncanny.
Then test the same verses with respect to the obviously anti-semitic claims like allegorism, British Israelitism, Christian Identity, Dominionism, Hitler's arguments, Islam, JW claims about Rev 7, KJVO claim LXX didn't exist pre-Church, Mormonism, preterism (common to Catholic & Calvinist doctrine), pre-wrath, mid- post- or 'no Rapture!' claims, Replacement Theology, SDA, theonomy. Notice that in each case the Jews are REPLACED BY the sect's hawked 'doctrine'.
Prolife is also anti-semitic. See my Prolife Blasphemy series to show how Satan uses Temptation #2 to wreck Bible translations; but for the anti-semitic connection, read davidduke.com/general/the-abortion-industry-is-led-by-extremist-jews_3618.html . Notice how the notorious anti-semite David Duke CORRECTLY states the Old Testament-and-hence-Jewish doctrine that Life Begins At Birth. And then, he uses it to make prolifers, anti-semitic. Don't kid yourself. If you're prolife, you're a tool of Satan. Not meaning to be, of course!
The unity of 'voice' is uncanny. Yeah, Satan's voice. Flee these doctrines, if you value your sanity at all. I've seen the sanity loss many times, even in my own family: it works like leprosy, but on the soul.
I discovered Satan's strategy by mistake, when trying to write up a comprehensive audit of what I learned under my own pastor, to see if the 'big picture' was coherent and correct. That occurred between 2000-2006.
So key webpage links on what I thus learned of Satan's strategy, follow below. There's nothing like 'em on the internet, sorry.
Angelic Trial backdrop: brainout.net/SurpConc.htm#SatPlan
Satan's Strategy today, intro: brainout.net/LordvSatan1.htm
Satan's Strategy for the Fall: brainout.net/LordvSatan2.htm#Fall
Satan's Strategy toward Israel and Church, initial: brainout.net/LvS4a.htm#MysteryMath
Satan's Strategy toward Temple (to wipe out Jews), post-Cross: brainout.net/LvS4a.htm#DomeWall
Satan's Revelation 17 Strategy (to politicize Church): brainout.net/LvS4aContinued.htm#Rev17
Satan's Attack Plan against Church: brainout.net/LvS4c.htm#SatAtPlan
Satan's MEGA Strategy: brainout.net/LvS4c.htm#MEGA
Satan's DIOS Strategy: brainout.net/SatStrat.htm#DIOS
Seven Characteristics of Satanic Sponsorship: brainout.net/SatStrat.htm#SevenCont
My pastor spent a lot of time analyzing Matthew 4. The latest upgrade in the analysis is in Lessons 933-963 (maybe through 983) in 1992 Spiritual Dynamics (series 376), available for free through rbthieme.org . They never ask for money. There is a limit on how much you can order each month. I hear that the current limit is 36 lessons (on mp3) per month.
Not sure how I can condense all that material into video form.