Matthew 5:17-20 is talking about :
Water baptism today---John 3:5 not circumcision today.
Christian attire today---1 Peter 3:3 not animal offerings today.
Segregation today----2 Cor. 6 not cleaning laws today.
Repentance today----Romans 6:1 not a natural high priest today.
Christian marriage today---Romans 7:2-3 not thou shall not kill only.
Rebuke today----James 5:20 not thou shall not judge only.
Women doctrine in the church today---1 Cor. 14:34-35 not thou shall not lie only.
Tongue and prophecy rules in the church today---ALL of 1 Cor. 14 not thou shall not have idols only.
Godhead beliefs today---John 8:24 not thou shall not have graven images only.
Who to support today---Gal. 1:8-9 not thou shall not commit adultery only.
Christian parties today--1 Peter 4:1-4 not thou shall not be drunk only.
Who to pray for today---John 17:9 not thou shall love only.
Who to evangelize to today---Matthew 7:6 not thou shall not backbite only.
Knowing people today---1 Thess. 5:12 not just meeting with people only.
Endorsement of all the bible today ---2 Timothy 3:16 not just endorsement of the cross only.
Perfection in Christ today---Matthew 4:4 not just outlawing the old law ordinances today.
Who a Christian is today---John 8:31 not just a 90% bible believer only.
Restricted editing today--Revelation 22:18-19 not just thou shall not be jealous or covet.
Revelation of the Holy Spirit today---1 John 2:27 not just hearing a nonbiblical voice teach.
Studying today---2 Timothy 2:15 not just get counsel at the bookstore or a pastor's office.
Hearing God today--Romans 10:17 not just any nonbiblical voice teach.
Godly counsel today---Psalms 1 not just nonbiblical counsel out there.
Truth rightly divided today----2 Timothy 2:15 not just anybody quoting bible verses.
Wisdom of God today--2 Peter 1:20-21 not just philosophy by the wisdom of man.
Modesty today---Romans 12:3 not what the world say with name and claim faith with everything.
Contentment today--1 Timothy 6 not what the world call going the extra mile to be successful.
Being despised today---Matthew 10:22 not everybodies hero like a politician.
Bad family relationships today---Matthew 10:34-37 not fitting in with your kin people well.
Having new friends once your saved while the old friends are no longer friends of ours
today---2 Cor. 6:14-17 and Amos 3:3 .
Discerning trivia laws today from old law ordinances is what Christianity is all about---John 5:39.
Again the noble goal is to attract 100% bible believers together only----Psalms 133:1.
90% bible believers can take an exit and never come back.
Never the goal here just to be informative and flattering.