Actually the truth about tornadoes and mobile homes is that many of the "tornadoes" that hit mobile home parks.....aren't.
The NWS takes 2-3 days to do damage surveys, and by the time they determine something was a downburst or straight-line winds, the media has moved on from the story.
The media (or residents of the park) see any serious structural damage or a home tipped over, it's immediately a "tornado."
The victims desperately WANT it to have been a tornado; makes a better, more exciting survival story to tell than something they don't understand, like a downburst or something. Also I think there's a sense of embarrassment if the damage was from something that wasn't a tornado.
And straight-line winds can be very, very strong; while usually not capable of causing damage to regular housing (though they do at times) they can be really destructive in a mobile home park.
That's as good a wild guess as mine.