The word "incapable" makes it sound like He is a subject, or somehow powerless in an area.
Many cultures and different upbringings will make folks look at words differently. I understand that. However, my life experience culture says this is not true with the word incapable in relation to the Lord. For it is not wrong to say that God is not capable of doing evil ever. However, it is your belief that Jesus can potentially do evil that renders God powerless or in not being God anymore. See, you can't say Jesus is God then turn around say that He has the capacity to do wrong. It would be a contradiction and it would be confusion of who God is. God is Holy and perfect in everything He does. So if Jesus could possibly do evil, then He is no longer God. Either the Lord our God is the Eternal Holy God who is always good and perfect in everything He does 100% of the time (with no capacity to fail or do wrong) or He is not.
How about we leave it at, "He would never".
How about no. Such a statement is avoiding the issue. Hence, why you said...."
How about we leave it at, ~ "He would never" ~ " (Which means, you are ignoring the more important issue at hand). For if Jesus had the capacity to do evil, then you need to preach that boldly from the roof tops because it is true. You should not be ashamed of the truth. But you should proclaim the truth boldly. But I believe that if you were to do that, you would be preaching another Christ, my friend (Because there is not one verse that suggests Jesus could have failed or that He had the capacity to do evil - Note: Hebrews 4:15 & it's related passage on the word "tempt" cannot be used as an iron clad case to prove your belief on this because the origin of the word can be defined as "tested." - Which then takes on a whole new different meaning; For even Modern Translations have rendered the word "tempted" as "tested").
Anyways, one of the factors that God is God is that not only is perfect and moraly good 100% of the time (With no capacity to do bad), but if God said such and such was going to happen and it came to pass, you would know that He was God. This was how the Israelites would know a false prophet from a real prophet. God's prophecies or promises always come to pass. See, Jesus said to his disciples that He was going to the cross and that he was going to be resurrected 3 days later. This was not a statement of "IF" or "MAYBE" it was going to happen, but a statement of "FACT" that whatever God says will come to pass without fail and with pin point accuracy.
For Jesus said in John 13:19,
"Now I tell you before it come, that, when it is come to pass, ye may believe that I am he."
We see in verse 33 (John 13:19), Jesus then alludes to his 3 days within the grave. Which He knows for a "FACT" will come to pass because He is God. But your version of Jesus would be thinking this to Himself after saying something like that, "Well, I don't know..... maybe this will come to pass.... I am not sure.... I struggle with resisting evil.... etc." But that would not be the Jesus of the Bible. Verse 19, Jesus says these things to his disciples so that they may believe that He is the "I AM."
Also see John 14:28-29, too.
His capability is not in doubt, and His character is steadfast.
I'm not sure if you agree with me, but perhaps this is an area where we can come to some unity?
At it's core.... I want you to trace the origin of what you think could make the Holy Son of God to potentially do evil?
(Side Note: I am not shouting in any emotion with the "Caps letters" within this post here. Merely emphasizing).