cavu
I made no comment on your views - you’re entitled to them - nor on whether Delta pilots would agree with them. I did however comment on your behaviour.
I've sat on the flight deck jump seat of a few US aircraft, and have had more than a few US pilots sit on mine. Neither I, nor they, have ever felt the need to say anything afterwards, other than "Thanks Captain, let me know when I can return the favour".
If you think it appropriate behaviour to accept a jump seat, and then afterwards make anonymous and derogatory comments about the flight crew, in a public forum, then you differ from every jump seat pilot I've had the pleasure of carrying. If you think you've impressed any US pilots by doing so, you are mistaken!
Your apology for any unintentional offence is welcome, but if you're not serious in your suggestion that the crew were inebriated, far better not to have made it in the first place.