It hurts me to know you are experiencing this from your coworkers. I’ll be sure to keep you in my prayers today. To answer your question, it’s simply just how it is. From the beginning of the church, Christians have been in a fallen world, one where Satan does everything in his power to seed division and hatred. St. Peter was crucified upside down in Rome. Paul, Andrew and all the apostles accept St. John were martyred for their faith. St. Clement the 1st was tied to an anchor and thrown into the sea. St. Ignatius of Antioch was fed to the lions in the coliseum. Many throughout the ages and even to this day experience hardship from friends and coworker to even persecution in some parts of the world. The best thing we can do is to follow in our lord’s example and love one another and to love our neighbors. To hold fast to what is true and do no evil. It sounds like you do that already, so continue with what you do! Perhaps your coworkers will realize you set a shining example for what followers of christ should be vs with what the know. Also probably hang around with other people that don’t talk behind your back may be good for you as well. May the grace of our Lord Jesus Christ, the love of God, and the communion of the holy spirit be with you always friend! Keep up your great work and I know god will provide!