Manifesto vs. Catechism
A manifesto is a public declaration. It’s your however-many-theses that you nail up on the church door. It’s your platform to stand up and declare war on the status quo.
A catechism, on the other hand, is your answer to the question “who are you”. It’s a concise summary of the principles that you believe in. It’s a fancy FAQ.
If your aim is to shake up the status quo, then by all means, you need a manifesto.
If your goal is to educate and build understanding, then you need to write a catechism.