They used extreme examples precisely because they wanted to avoid the challenge that will necessarily come otherwise.
For example spreading false rumors that children's hospitals are giving sex changes to young children and saying that "somebody needs to put a stop to these evil monsters mutilating children" [2][3] is definitely incitement. Calling teachers that mention the fact that they are in a gay marriage "groomers" which implies that they are child molesters is also incitement. That's not good faith debate. It's smearing people in the hopes that someone will harm them.
1. https://publications.aap.org/pediatrics/article/150/2/e20210...
> We found that an average of 5 years after their initial social transition, 7.3% of youth had retransitioned at least once. At the end of this period, most youth identified as binary transgender youth (94%), including 1.3% who retransitioned to another identity before returning to their binary transgender identity. A total of 2.5% of youth identified as cisgender and 3.5% as nonbinary. Later cisgender identities were more common among youth whose initial social transition occurred before age 6 years; their retransitions often occurred before age 10 years.
2. https://tennesseestar.com/2022/10/03/matt-walsh-announces-ra...
3. https://www.losangelesblade.com/2022/03/28/gubernatorial-say...
You didn't give us examples from either side of the line to show us where the line is, you gave one example that's totally fine ("X is a jerk" isn't going to get anyone arrested in the US) and one that's a direct incitement to violence. The examples are miles apart and the line could be anywhere between them.
The Matt Walsh example doesn't really help either. If I said "someone needs to put a stop to these evil monsters pumping carbon into the atmosphere" in the context of protesting a new coal mine, pretty much everyone would understand there was an implied "...by turning up to my legal protest next Tuesday and waving some placards around" on the end. Saying the owners needed to be lined up and shot may or may not be incitement, but again that's a pretty extreme example, and it still doesn't look simple.
When you really think about the middle ground, the examples get very murky. They are not simple.