Not a complete answer. Just some thoughts to start with.
I think the first key is to figure out the correct translation.
Isaiah 45:7 I form the light, and create darkness: I make peace, and create evil: I the LORD do all these things.
Form and make: Making something from already existing materials.
Create: Make something out of nothing.
If God is only good then the 'material' is readily availble within Himself. And the availble evil has to be made from none existing materials.
That said (ancient) Hebrew scholars seem to view darkness as the absense of light. So darkness is missing the material called light.
Then if light=love and dark=evil.
Then the 'forming evil' simply means God stops 'injecting light'.
That would mean creating evil is a passive action and cretaing love a active action.
It's even reflected in the universe. A light (sun, stars) consumes massive amounts of energy to shine. When the energy(love/light) is depleted there is darkness (=evil)
I'm already way of track here so lets wrap this up with saying that creating evil perhaps just means cutting of the energy supply?
WW here is a post I gave concering this in the other thread were we talked about this.
And it is scriptural
7 At what instant I shall speak concerning a nation, and concerning a kingdom, to pluck up, and to pull down, and to destroy it; 8 If that nation, against whom I have pronounced, turn from their evil, I will repent of the evil that I thought to do unto them.
9 And at what instant I shall speak concerning a nation, and concerning a kingdom, to build and to plant it; 10 If it do evil in my sight, that it obey not my voice, then I will repent of the good, wherewith I said I would benefit them.
11 Now therefore go to, speak to the men of Judah, and to the inhabitants of Jerusalem, saying, Thus saith the LORD; Behold, I frame evil against you, and devise a device against you: return ye now every one from his evil way, and make your ways and your doings good. 12 And they said, There is no hope: but we will walk after our own devices, and we will every one do the imagination of his evil heart. 13 Therefore thus saith the LORD; Ask ye now among the heathen, who hath heard such things: the virgin of Israel hath done a very horrible thing. 14 Will a man leave the snow of Lebanon which cometh from the rock of the field? or shall the cold flowing waters that come from another place be forsaken? 15 Because my people hath forgotten me, they have burned incense to vanity, and they have caused them to stumble in their ways from the ancient paths, to walk in paths, in a way not cast up; 16 To make their land desolate, and a perpetual hissing; every one that passeth thereby shall be astonished, and wag his head. 17 I will scatter them as with an east wind before the enemy; I will shew them the back, and not the face, in the day of their calamity.
Here we see God saying that because of the evil man does in disobeying His voice God himself will visit evil upon them "I make peace, and create evil".
So how is it that God who is LOVE and LOVE worketh NO evil, is said to create evil?
Or how does God create evil?
Evil is not the opposite of good evil is the absence of good.
Therefore God creates evil by withdrawing His presence or turning His back. "I will shew them the back, and not the face, in the day of their calamity".
And we see this same principle throughout scripture, God turning His back on man because of mans disobedience, and as evil is the absence of God of good when God turns His back or withdraws His presence evil abounds.
Thus God is not working evil, He just turns His back and gives man up to the desires of their own hearts.
Do we not see this same principle brought out here
6 For the LORD hath called thee as a woman forsaken and grieved in spirit, and a wife of youth, when thou wast refused, saith thy God. 7 For a small moment have I forsaken thee; but with great mercies will I gather thee. 8 In a little wrath I hid my face from thee for a moment; but with everlasting kindness will I have mercy on thee, saith the LORD thy Redeemer.
7 For a little while I left thee: but with great mercy will I have compassion upon thee. 8 In a little wrath I turned away my face from thee; but with everlasting mercy will I have compassion upon thee, saith the Lord that delivers thee.
Why is it God left and hid His face from them? Was it not because of disobedience?
Now lets jump down to verses 16 & 17
In the KJV these scriptures seem to be saying God created the smith that bloweth the coals and the waster to destroy.
16 Behold, I have created the smith that bloweth the coals in the fire, and that bringeth forth an instrument for his work; and I have created the waster to destroy. 17 No weapon that is formed against thee shall prosper; and every tongue that shall rise against thee in judgment thou shalt condemn. This is the heritage of the servants of the LORD, and their righteousness is of me, saith the LORD.
Now lets look at the Septuagint for a TOTALLY different view then what the KJV seems to present.
16 Behold, I have created thee, not as the coppersmith blowing coals, and bringing out a vessel fit for work; but I have created thee, not for ruin, that I should destroy thee. 17 I will not suffer any weapon formed against thee to prosper; and every voice that shall rise up against thee for judgment, thou shalt vanquish them all; and thine adversaries shall be condemned thereby. There is an inheritance to them that serve the Lord, and ye shall be righteous before me, saith the Lord.
Which version seems to be more in lines with God who is love and love worketh NO evil?
You will all have to decide that for yourselves but I would like to point out one more thing concerning those verses.
If like the KJV states that God created the smith and the waster to destroy why does He then say NO weapon that is formed against thee shall prosper?
Surely if God formed these weapons against us they would prevail would they not?