It really does not take that much effort to not be completely horrible to someone. There is never a reason to take time out of your day and go out of your way to make someone feel bad for no good reason. It's not that hard to act decently and treat people like human beings. And yet, this simple concept is hard for some people to grasp.
The people around you are people. Human beings. They may be different than you, but they deserve to be treated with respect and to live their lives without you making them completely miserable. Whether they're a different race, ethnicity, sexual orientation, gender, or they speak a different language, they're just people, and they deserve the same rights as you. No person deserves to be treated horribly just for existing.
If you don't have anything nice to say to a person, it really is not that hard to shut your mouth and not say a single word. It benefits no one to spew vitriol. People don't need to hear mindless insults or to be told that they're a disgrace, shouldn't exist, should change themselves, or should go back from where they came from. No one needs that, and it makes you look like a terrible person. Perhaps because, if you're someone who goes out of your way to insult and dehumanize other people, you're exhibiting horrible behavior.
It's not just that, it's the littler things, too, like insulting someone's hobbies, interests, and the things that are important to them. Or making fun of those things. Making someone feel bad about the things that they like and enjoy is a horrible move, and there's literally no reason to do it. It is literally always easier to say nothing and let it go than to say those things to someone's face. It benefits no one.
Unfortunately, the Internet and social media has made all of this hard. Sending anonymous messages and posting hatred via Twitter, Facebook, or other platforms has a degree of separation to it, and we feel we don't suffer the same consequences we would if we said all of these things in real life to somebody's face. Would you say the same horrible things you said online out loud to that person's face? Well, it would make you a pretty awful person if you did. The Internet removes us from reality and gives us a platform to be terrible to people, and it needs to stop.
So maybe just take some time and make an effort to not be horrible to people. It's not as hard as you think. Keep your hatred to yourself, or better yet, try not to hate at all. You don't have to go out of your way to be nice, but just treat people with respect. Leave them be. Treat them how you'd like to be treated. Don't forcibly rip their kids away. It's not that difficult to not be a horrible person.