Theravada and Mahayana - The Crucial Differences

I struggle with the idea that Buddhism has two warring schools and wonder why they cannot make peace. What are the issues on which Theravada and Mahayana cannot agree? Just bullet points would be fine. I'm not inviting an argument about who is right, just asking for the facts. A summary of key doctrinal differences is what I'm after, if this is possible. Issues such as which scriptures are authentic may be omitted since this is not a doctrinal difference, but differences in the interpretation of those scriptures would have to be included. Thanks. EDIT: Thanks for all the answers. They make fascinating reading. The question has been answered well enough for my purposes.