What The Custodian
is saying is that he/she/it
to conduct a debate
if the other person brings in something to it to which The Custodian
cannot personally relate.
People's belief are part of who they are - whether they be beliefs in God or in the equality of all men
or the ultimate reasonablesness of science
. If you can't talk to someone because their personal point of view
differs greatly from your own, you're going to find yourself having narrower and narrower discussions.