No, condemnation is never the main thrust of the message of the Gospel of Christ. It is forgiveness. Sometimes warnings, but that is not the main thrust of the message of the gospel of Christ which is forgiveness.
Jesus did not come into the world to condemn it but to forgive and save it (John Chapt. 3).
Those who preach condemnation are generally those who themselves are still under the condemnation of the law and haven’t fully understood or embraced the grace of Christ by which they are the righteousness of God in Christ WITHOUT works.
They skip over the message of forgiveness to highlight the warnings and condemnation, but don’t forget
1) Jesus never condemned or “warned” Gentiles who knew already they were sinners as they do today. The only group Jesus warned and condemned were the religious leaders of his day - the Jewish Pharisees in particular, and the nation of Israel in general who were in the process of rejecting their Messiah.
2) These warnings in Acts were exclusively to the Jews who as Paul said, were to be the first to hear the gospel, but when they rejected the gospel of grace because they still wanted to be righteous by their own works, Paul went to the Gentiles who heard gladly the message of grace and eternal forgiveness without works through Christ.
Unfortunately, much of today’s church has gone back to the law and are not obedient to the faith of the grace of Christ that Jude says was “once delivered to the saints” and now once again must be “contended for”.