If We’re Not Under the Old Testament Laws, Why Are We Using Them to Condemn People?

Questions about why people are using the Old Testament laws to condemn people if we’re not under those laws, thoughts on Christians celebrating the feasts of the Law out of obedience to the Lord, and whether we should keep the feasts so we’ll recognize Christ at his second coming.    If the Old Testament laws were not even meant for us, then why are so many using the old laws to condemn people now? What do you think about my friends insisting that Christians celebrate and honor the various feasts of the Mosaic Law—not out of a spirit of legalism, but merely out of obedience to the Lord who saved them? Just as part of the purpose of the Mosaic Law and sacrificial system was to teach God’s people how to recognize Jesus when he came, should Christians be keeping the Feast of Tabernacles and other commands so we can recognize Christ at his second coming?