Should Christians repent for the failures of Christianity to live up to Christ's commands in Church history?

Looking back at church history, the Universal Church has failed miserably at keeping Christ’s command when it comes to all Christians. > A new commandment I give to you, that you love one another: just as I have loved you, you also are to love one another. By this all people will know that you are my disciples, if you have love for one another.” (John 13:34–35, ESV2016) Jesus’ statements are clear unless one seeks to put a limit to God’s love as the lawyer responding to Jesus: > But he, desiring to justify himself, said to Jesus, “And who is my neighbor?” (Luke 10:29, 2016) To which Jesus gave the parable of the Good Samaritan, from a group the lawyer hated, and concluded: > Which of these three, do you think, proved to be a neighbor to the man who fell among the robbers?” He said, “The one who showed him mercy.” And Jesus said to him, “You go, and do likewise.” (Luke 10:36–37, ESV2016) In case that isn’t enough, Jesus said, > “You have heard that it was said, ‘You shall love your neighbor and hate your enemy.’ But I say to you, Love your enemies and pray for those who persecute you,… (Matt. 5:43–44, ESV2016) We as Christians need to repent for how we have treated one another and how we have treated non-Christians, especially about our past history where Christians have gone as far as burning people at the stake for disagreeing with our particular beliefs. **While this extreme isn't present today, still the lack of love often is present today. This is a stark contradiction to the New Testament.** How will people know that we follow Christ if we do not love one another? While we as individuals are not responsible for the sins before we were born, should we not be clear to all people that we acknowledge as abhorrible those sins of the past done as a group under the same name we are under today? Those sins were stopped by government mandate rather than repentance. Some forms of fascism would like to bring some of these sins back.