How to be less racist/bigotred?

So I am a part of the LGBTQ community and work in a big city in middle europe. A lot of my coworkers are religios and have a foreign background. They are mostly very nationalist and homo-/transphobic. I hate them for their blind hate and bigotry, which wont change. I have realised, that I have become a bit bigotred towards people like them in the last few months, which is, even tho my biases often revealed to be true, just unfair to them. How could I stop that?