Because some developers will take offense. They will think that if you call the language they use trash then you are calling them a trash developer. It's odd,

Because some developers will take offense. They will think that if you call the language they use trash then you are calling them a trash developer. It's odd, there are developers who make the language they work part of their identity and see attacks on that language as attacks on their identity. I don't get it, but it is what it is. If you call javascript trash, you will offend people.