how to deal with revisionism?
mhb: It seems like you are mixing up revisionism with coming to a conclusion about a debatable topic. The holocaust and global warming are not differences of scale - they are differences of kind.If you question whether the holocaust occurred, you should also be questioning any other events which you didn't personally observe.  And maybe even ones which did happen to you.  So unless this kind of philosophical debate is what you are wrestling with, including the holocaust on your list muddies the question you are asking.