background assumption of infinite amounts of time to consider things

LOL. While ars may be longa, vita is certainly brevis. This is a silly assumption, better suited for theology, perhaps -- it, at least, promises infinte time. :-)

If I were living in English countryside around XVIII century I might have had a different opinion on the matter, but I do not.

interpret comments charitably once you have, for whatever reason, got into a discussion

It's not a binary either-or situation. I am willing to interpret comments charitably according to my (updateable) prior of how knowledgeable, competent, and reasonable the writer is. In some situations I would stop and ponder, in others I would roll my eyes and move on.