Detailed dissection of events we haven't physically been present for is a large part of this forum. It can be a good teaching tool. Docs do it all the time. It's called 'morbidity and mortality conference'. Most places I've worked in EMS or in hospital as an RT, etc, have ongoing reviews of policy and procedures and certainly get together and go over any events that may have been more 'out of the norm' than usual.
Some see it as 'Monday Morning Quarterbacking'. Others see it as an after event self evaluation.
To be right up front: you're new here. This is what happens all the time. Sometimes the discussion is ... well... quieter than others. Other times you need an 1&1/2 inch hose to separate the parties. The divisions here get intense. EMT-Ps vs EMT-Bs. This country vs that country. FF vs EMS. Pick a pair and you'll find them going at it.
Sometimes you share and learn a lot. Sometimes the best thing you can do is bite the bullet, not reply and move on. Just remember: you don't work with anyone here, they don't write your performance review and it really doesn't matter, at the end of the day, what anyone thinks of you but yourself, your employers and your patients.