2 Thessalonians 1
To the church of the Thessalonians We must always give thanks to God for you, brothers and sisters, … we boast of you among the churches of God for your steadfastness and faith during all your persecutions and the afflictions that you are enduring. … it is just of God to repay with affliction those who afflict you, and to give relief to the afflicted as well as to us, when the Lord Jesus is revealed from heaven with his mighty angels in flaming fire, inflicting vengeance on those who do not know God and on those who do not obey the gospel of our Lord Jesus. These will suffer the punishment of eternal destruction, separated from the presence of the Lord and from the glory of his might, when he comes to be glorified by his saints and to be marveled at on that day among all who have believed
Here is another passage about the Second Advent. Note again, that it will be a terrible day for non-Christians. It is a very common criticism of Christians that they are judgmental and intolerant. It is said we are to be pluralistic and multicultural and avoid any talk that distinguishes between “us and them”. The Apostle Paul must have missed that memo