I think you’re just seeing a representation of the times compounded by 30 Rocks refusal to engage seriously with a single social issue. Not to downplay any of it but the racism in that show was very Obama-era Carlos Mencia “racism is funny not hateful” type of rhetoric. Definitely problematic at the time even if you ignore the longer-term consequences. Honestly every single of representation of social progress or liberation in 30 Rock is truly awful down to Liz Lemon Feminism™️.
Anyway I don’t think Tina’s writing is inherently hateful, it’s just lib as hell and she doesn’t want to actually try to engage with any real issue.