"Congress should revise the law that gave tech platforms freedom without responsibility."

In the United States, you are free to speak, but you are not free of responsibility for what you say. If your speech is defamatory, you can be sued. If you are a publisher, you can be sued for the speech you pass along. But online services such as Facebook and Twitter can pass along almost anything, with almost no legal accountability, thanks to a law known as Section 230.