BK,
As you can obviously see, there are many S/O's or JFO's with a puffed chest that want to give it to a DEFO on this forum. They get brave due to anonymity. As for color of passport...that's crap! There are many Brits and Aussie's that hate North American's but also many good guys too. The ones that hate us we just hate them back!
While on Freighters, you will be flying with some good guys. When you eventually cross over, you will be a SFO and a Relief Commander. On the ULH flights you will be #2 in-charge. S/O’s are the least of your concern!