Sorry ladies, I respect you both a great deal, but he brought this all on himself. Paul's comment wasn't a nit-pick about terminology, but trying to help someone that could have been legitimately confused when trying to board a coach car with a sleeper ticket. As I said in my first post to him, if he didn't find it valuable, he could have done the gracious thing and said nothing, but by choosing to be rude deserved the not-even-harsh words that he got.
You'll note that he immediately attacked Amtrak "They can't even get their car numbering correct" when it was pointed out the difference between the two numbers on the car, which he would have also found confusing when he was looking for a car numbered 1430 and only saw cars with numbers like 39039 painted on the side.
If you want to be treated with respect, you've got to treat others with respect.
Edit to add: I do agree with the general premise that as a group, rail fans can be a bunch of overly nit-picky fools about some topics - this just isn't one of them.