The nose gear could not dig in and collapse once it was down and locked, it rotates aft. Take a close look at the nose gear pictures and you might see what I'm talking about.
If there is foam on the runway the engines will suck it up fine even without the help of a nose gear.
Anyway a happy ending for the crew and passengers.
Wolf
It doesn't matter which way the nose gear pivots, if it had dug into the runway it would have broken at its mount to the airplane and folded toward the main gear. What did you think I meant by "collapse"?. Why do you think the crew took such care to lower it gently?
The engines are still mounted feet, not inches off the ground. Foam would have been a few inches high at the most. It takes a lot of water to flame out a jet engine-- they land in blowing snow and land and take off and land in driving rain all the time.
Anyway happy ending for the crew and passengers, agreed.