I think the difference is whether there’s a specific threat or call to action. “If (blank) is true, (blank) will likely happen” is a sentiment I see online frequently, even here.
I would consider that different than, for example, Trump instructing a mob of people to “march on the capital” on January 6th. That’s a call to action that resulted in deaths.
This lady sounds like someone’s racist mom who shared misinformation on social media and her post went viral. She deserves to be shunned, but I don’t think jail is the right answer.