Haven't heard of him, but I've read some of the main points of Soka Gakkai and it seems a good "religion". I already live my life by those rules, and I hope most others do so as well. Soka Gakkai will never be a big movement though, because by nature it is a peace-loving and non-invasive religion. This means that other religions that are not peaceful (christianity, islam, etc.) will use their force to dominate these smaller religions. Tolerance for the intolerant, will always result in a victory for the intolerant, so intolerance will prevail either way. The only way to stop the intolerant from winning is by becoming intolerant as well. But that defeats your initial purpose of being tolerant, hence intolerance always wins.