Thanks. I suspected as much; bummer.You'll be sort of OK putting a tent up there so long as you don't get up there with it.
Total capacity for the roof rack is 165 lbs evenly distributed on the rails. The crossbars aren't that strong and the roof holding the rails isn't particularly strong. There's just no real reinforcement under the rails. Big hole with a moonroof in it. Not for much more load capability than a ski/luggage box or bicycles really. The roof metal is there to hold that paint up, not a whole lot more.
The Passport roof to my knowledge is not rated to be stronger than the Pilot roof.I highly doubt the Passport magically has a stronger roof than the Pilot. Search rooftop tent on this forum and you will see some posts about people who have attempted this sort of thing. If I recall correctly, due to weight distribution and using the roof rails, it can handle a tent like that.
Last summer we rented a 4Runner out in CA with a tent like the one on the Passport and it was an amazing experience. Too bad Honda doesn't make any car capable of real overland type activity. I am still sort of considering it as a casual way to camp but those tents are very expensive!