I was hella annoyed at the time. And I still feel that Marshawn would have gotten in but... apparently they hadn't been successful on goal line plays that year and the benefit of passing there is it saved a timeout . It was 2nd down , so the logic was to pass and not use a timeout. Then on 3rd down you could potentially run or pass. If you run on 2nd down, the defense knows you have to pass on 3rd down (unless you do a QB draw with the option to throw it in case there wasn't a clear path to the endzone)
The unsung hero of that play was "#39" who blew up Jermaine Kearse. Kearse was supposed to pick Butler but couldn't.