I think that you might have missed a vital part of the comment you originally replied to.

They were responding to another Redditor telling an anecdote about witnessing a scenario where a cyclist was hit by a car, then the motorist threw his coffee at him, and then sped the car at him and swerved at the last second in an effort to scare/intimidate the cyclist.

but if you read any comments from sfgate it's all about how cyclists need to stop at stop signs and are destroying the city

In other words, if you were to read a story about the above encounter, and then scroll down into the comments, what would you find? You would find this:

I also feel it's important to point out that not all cyclists obey the law. [Personal anecdote]

Is it really important? Is it always important, when something bad happens, to use it as an opportunity to grandstand with your perspective on the topic, and then tell your personal anecdote? In what way is it important? Is it productive? Does it change people's minds? Does it keep people objective? Do you make sure that when the opposite story is in the news, that you also comment "there are a lot of bad drivers too"?

When mass shootings happen, there are two kinds of people in the political aftermath. There are those who take the opportunity to use it as an example for their political purposes, and then there are those who condemn that kind of thing.