The absolute best thing you could possibly say about this law is that is a pointless waste of paper and legislator’s time. If we take it to not at all move the bar towards a driver’s ability to kill protesters and get away with it then it does absolutely nothing. If we take it to not even be a statement that we are, as a society, too critical of drivers who kill protesters then I don’t even know what it is.
I don’t think lawmakers wanted to encourage murder. I think they wanted to frighten protesters. The alternative seems to be thinking that the bill was the product of a thousand monkeys at a thousand typewriters and that the congress is committed to passing every syntactically correct thing those monkeys type, regardless of its content.