Unsure how to get on board with the "fantastic belief system" part (what exactly is 'fantastic'?), or the anti-conflict part as I believe most scholars of ancient history would say it has been the driver of the Chinese state which has 'integrated' numerous adjacent cultures over the last 2500 years. Present era stability is nice, however this was not always the norm, so I am umsure how much can be ascribed to Confucianism...
It is fantastic because it doesn’t make up a supernatural being or god. It stresses strong family values, compassion, creativity, self-help, reverence and kindness.
That is a pretty weak response. I believe we should judge the impact of cultural traditions by their practice not by their supposed theoretical scorecard. Your statements could be equally applied to all the major monotheistic traditions and look how much war and suffering they have produced.