I think that they're likely to be real tbh.
But I don't believe that Trish holds any real ill will towards the Asian community, I just think that she's one of those Twitter users who loves to attention seek on the site, and saying racist **** will draw a lot of attention to you.
And tbh her Justin Bieber comment in 2012 was basically what everyone was saying about Bieber back then, we're all bad people according to some of these people kicking up a stink about that particular Tweet from Trish.