Freedom of speech is a valuable thing. It's it's value which should be defended. To an extreme also, even hateful speech also coud should be free speech. But i cannot deny that comes from thought. And thinking and speech have a tendency to flow into action. Action is limited strictly by law but thought is not regulated.
Swami Sarvapriyananda teaches the Katha Upanishad, which is one of the most popular Upanishads. The scripture concerns the story of a young man who goes to the house of death to find out what happens after death. The reply describes the nature of reality and the meaning of life.