The very statement FINISH AND COMPLETE proves your stance is ignorant!
what scriptures are they that say that all the conditions Jesus taught man to do are already fulfilled?
its all based on the conditions He Himself made when He gave the Promises along side the instructions. no different from He has done it always. God explains His Love and Mercy, His desire that man returns to Him with all thier Heart, His willingness and desire to forgive and restore them to glory and relationship with Him, With God Himself"
God has desired this in His word repeatedly from the beginning. and what the Gospel is, is Gods Last reach out to mankind He reached as far as He Will when Jesus suffered and Died to become sufficient to call a believer to repentance through that display, Love should compel us, to Give Our Lives to the One Who gave His for us. this would and always Has and will include learning and keeping His ways from Israel, to Jesus, to Peter, to paul. there are no doctrines that actually teach a believer to Believe thier part is already accomplished. They are supposed to Believe Jesus did His part, and offers New Life, His spirit of comfort and teaching, wisdom and strength...so that we can Now Live By that spirit and do Our Part.....
rather than Jesus already did My Part so I dont have to do anything......it should Be Jesus actually did His part and it is true and it is enough to give Me the will and strength to follow Him as Lord. and No matter How we Like to say it if we Have a Lord...His Word is Our Law. if we Have a King....His decrees are the Law of the Kingdom.
Jesus didnt repent for us so we need not repent or confess, He doesnt Obey for us, so we need not , He didnt Help the Poor so we dont Have to, He didnt suffer so we can go on guilt free Living in sin pretending well Never face Judgement. He actually taught us to do those things, explicitly saying " do not only Hear my words my sayings, you need to put them into practice in your Life" thats a consistant thing He said it several Times. he made the special Point you have to do this stuff or it wont work for you. it really doesnt actually say anywhere that Jesus finished Our part , it says He forgave us, and offers the Holy spirit to all who will believe and Obey Him because they Believe. part of what saves People is that they do the things He says to do....that is the Ultimate display of real belief, if He says do this and you will be blessed.....to do it says I believe.
there is alot for us to do, and alot of capability we have been Given in the Promise of the Holy spirit. it is the Power to change Hearts at the core. until Jesus came and taught about the Holy Ghost, No One really ever understood anythng about the Holy ghost and until Jesus died as an atonement, man was not worthy to receive the spirit...it Only comes through Jesus and the Gospel He spoke forth. the Promise He gave of the spirit, is conditioned with abiding his word, Gods Promises are always based on His goodness, but they are always conditional from eden to revelation. the condition , even more than that, Has never changed
think of it How hard is it for man to simply do the right thing daily in Life? we all would say " No ones perfect except Jesus" and thats true, but since the beginning God has said " Just Hear my Word, and Believe it and you will Live." true Belief creates action. if I believe i need to obey God, i will begin to Obey God. if I believe Jesus somehow obeyed so that i dont have to, i will never make the effort to learn and Obey God...because I sinply dont believe i am supposed to obey, or I am commanded to Obey, Or God is actually teaching the Believer through His word....