The main to note with this song is that "you" is consistent - they are someone who hates people who do good things. Now, it doesn't appear this "you" hates people because they do good things, but it's rather a statement that this person's opinion is completely irrelevant. Rather, the difference in opinion between them and the narrator is completely arbitrary - it's the titular birth defect. They have different perspectives because they were born in different circumstances, so that's no reason to hate, but their baseless hatred is a reason not to respect them. The last thing is the first seems to imply that "you" is practicing genocide against the people they hate - probably based on that "birth defect". It doesn't sound like it's literal genocide though, it sounds more like this person is just manipulative and cuts people down, but it's hard to tell exactly what is being referred to. In short, the song is saying that just because you don't like someone doesn't mean they are a bad person, and if you believe you're a contempt worthy person who should be stopped.
The main to note with this song is that "you" is consistent - they are someone who hates people who do good things. Now, it doesn't appear this "you" hates people because they do good things, but it's rather a statement that this person's opinion is completely irrelevant. Rather, the difference in opinion between them and the narrator is completely arbitrary - it's the titular birth defect. They have different perspectives because they were born in different circumstances, so that's no reason to hate, but their baseless hatred is a reason not to respect them. The last thing is the first seems to imply that "you" is practicing genocide against the people they hate - probably based on that "birth defect". It doesn't sound like it's literal genocide though, it sounds more like this person is just manipulative and cuts people down, but it's hard to tell exactly what is being referred to. In short, the song is saying that just because you don't like someone doesn't mean they are a bad person, and if you believe you're a contempt worthy person who should be stopped.