Polls show voters don't support the protesters, but are even more opposed to sending in the military.
This morning, we got the first batch of polling data on how people are feeling about the LA situation, and I think it's worth covering. Despite apparent conventional wisdom that the events would help Trump (and he is clearly looking for a fight, so probably agrees), the data show voters do not initially approve of his response, even if they don't approve of the protestors, either.
The point is: The default assumption that the LA protests help Trump seems thinly evidenced at this point. They may very well end up hurting him.