>>10800207 lb
In my experience, a person who believes whatever he believes because of a lifetime of thinking for himself is not compelled to try to convince anyone else what to believe, or that his beliefs are right. He would be interested in helping others to think for themselves and discover truth, in their own way and their own timing. He would understand you can never shove truth into someone even if his own understanding is indeed the right one.
But someone who believes whatever he believes because those ideas were implanted into him by external mechanisms that he doesn't understand- subconsciously he needs to continually justify what he thinks he believes by pushing it on others.
Since he is not actually able himself to discern whether it's the truth, his method of "proving" to himself that it's correct is to challenge anyone who believe differently, and to feel satisfied that it must be true because no one can disprove his beliefs.
In the rare case that he happens to get a few people to accept those beliefs as an external implanting into their own minds, like what happened to him, that's a delicious bonus for him but not the primary motivation of his subsconcious.