Second, you fight a ticket in court, not while it is being given to you. You won't win fighting it while it is being issued. You just won't. But you have a pretty good chance of doing so in court, especially if you are an old man who was crossing the street.
The cops didn't "rough him up", particularly not for jaywalking but also not for not speaking English. It doesn't really take speaking a language to realize that you don't act like an idiot around cops, trying to grab things from them or fight them or leave when they are talking to you/issuing you a ticket.
And he admitted that he got scared when the cop talked into the radio that he was calling for backup despite the fact that he couldn't understand the officer. It would be much more reasonable to assume that the cop was calling for someone to translate what he was being cited for than to automatically assume the cop called for "backup". But then he started trying to take something (his ID) from the officer before there was someone even there to enable communication between them, and fighting the officers arresting him.
There is nothing but his word that he was pushed by the police. And we know that he started fighting them first. I doubt his story, yes.