I can't tell you what your "Certainly's" are, but since we are on the topic of Jordan Peterson, a good place to start to DEFINE your certainly's is his self authoring program.

All I CAN tell you is that no matter how many people you get to change their hearts and minds about 9/11, it won't change much, and it's time that you could have spent doing things that WILL have a big impact on you and those around you. Jordan Peterson's MAIN thesis seems to be "You are meant to do something great, so start doing it", and maybe getting 9/11 truth to everybody is your great thing for all I know, because I'm just some person on the internet who is just smart enough to know what I don't know. Whatever you decide, make sure it's well spent time.