Although this notion that "Jesus could have sinned" is not new, it is not so much in the forefront of the talking points of today's Apostates. Nevertheless, it lurks deep within the recesses of their wicked heart. They derive this concept from Heb. 4:15 (He was tempted in all points as we are) which they skillfully twist to mean that He had the capability of sin within Himself and therefore could have succumbed to sin at any time. This conclusion is reached through willful ignorance of the Scriptures and the Character of the God they think they worship. It is mockery of the highest order. This 'willful ignorance' applies to all who hold this false doctrine because they have opted to ignore the known verses that speak to this fallacy, refused to investigate for themselves, and have chosen to take the word of another over the Word of God. Some have defined 'holiness' to mean 'sinless perfection' and in their next breath claim that "Jesus could have sinned," not realizing they have become mastered by the master of the double minded. Their wickedness is compounded when they state that it is more important for the "debate" to continue on, rather than to reach a Scripturally based conclusion.
There is a huge difference between being tested (as Jesus was, repeatedly) and being tempted with participation in a sinful act. The testing that the Lord Jesus successfully endured was to show His enemies that He could not be tempted with evil because there was nothing in Him that was in any way common to evil. James 1:12-16 details the progression from the birth place of sin (being drawn away by his own lusts or evil desires) that always ends in death. If it were possible for Jesus to have sinned that would necessitate the presence of some amount or form of evil within Him, something that the Scriptures vehemently deny. 2 Cor. 5:21 denies this possibility as it states "For He made Him WHO KNEW NO SIN to be sin for us..." Christ did not 'know sin' until our sins were laid upon Him. This goes even further to indicate that there was no "lust" or desire for sin in Him, nothing in His human nature that even a small spot of iniquity could be detected. If there were, then He would not have met the requirement of being the Spotless Lamb (Heb. 9:14 & 1 Peter 1:19). 1 John 3:5 "...in Him there is no sin" not just the commission of a sinful act, but the lack of the propensity to it. Rom. 1:23 speaks of the "incorruptible God" so if it were possible for Jesus to have sinned there would have to be some sort of corruption within in Him to do so---which there is not.
Let's dig a little deeper with the ramifications of this lie. Heb. 13:8 "Jesus Christ is the same yesterday, today, forever." So for us to accommodate the nonsense put forth by these mockers and naysayers, one must believe that Jesus 'could have sinned' prior to His earthly incarnation AND at any time in the eternal future. Would any of these be so bold as to verbalize this? Then there is John 10:30 "I and My Father are One." Don't play the hypocrite, you who are mighty to mock, just say it, you actually believe (by the use of your own words and ill-gotten logic) that the Father could sin also. What those who claim that 'Jesus could have sinned' don't realize is that they have already accused Him of sin, because for a man to do sin there must be an evil desire within him already, which is in itself a sin (James 1:12-16). Heb. 7:26-28 goes further as here Jesus is described as being "holy, harmless, undefiled, separate from sinners..." And "...appoints the Son who has been perfected forever." That's "perfected forever" for all eternity prior to His incarnation, during the same, and ever after His resurrection----perfected, no spot, ever. John 8:29 "I always do those things that please Him." Would these apostates have us believe that the lingering "possibility" of the Son of God falling into sin pleases His Father? Seems so, or maybe this is another of the verses they conveniently ignore. What they don't realize here is that to maintain there heresy they must also call the Son of God a liar, specifically in this verse. John 7:18 "...and no unrighteousness is in Him." Yet these apostate clowns would have us believe otherwise while again calling Jesus a liar.
Faithful theologians have dubbed this the "Impeccability of Christ." Several helpful articles, sermons, etc. can be found with little effort. Those that hold to the false doctrine (the lie) that "Jesus could have sinned" are a blood-thirsty lot. They will not spare those who do not conform to their beliefs, but will with threats of bodily harm, character assassination, and removal from their "fellowship" hound what they consider to be worthless to their organization. Beware. Lastly, take great comfort in the knowledge that your Savior always has been and always will be sinless, and that there is no chance that this will ever change--Heb. 13:8. To think otherwise only ends in the notion that our faith in Christ is vain and useless and this is exactly the ploy of the wicked one, to discourage and cause one to recant the faith. Resist him steadfastly in the faith.
"Afresh, precious, precious Jesus, I resign this body to You, for doing or suffering, for living or dying. Will You accept it? Will You use me for Your glory more than heretofore, that You may have some little return for all the benefits You have done to me? Oh, do grant this request; my heart longs for it, my spirit pleads for it; and "if You will, You can." You know the hot temptation of which I am the subject. Bring Your glory out of it, and keep me from the evil, and it shall be well." - Ruth Bryan