I'm sorry, but the question you provided seems to be incomplete or inaccurate. It is not clear what specific methods the student protestors at Liverpool University and the students at U.S. antiwar universities are being compared on. In order to provide a clear and concise answer, I would need more specific details about the methods being compared and contrasted between the two groups of student protestors.
If you can provide more specific information or rephrase the question to highlight the methods you would like to compare and contrast, I would be happy to help you with a detailed response. Feel free to ask for clarification or provide additional context so we can address your question accurately.
