Do you have the right to say that? Sure. Do I think anyone will care what you think after saying it? I won't.
People think that because they have the freedom to do something that they can do so in whatever manner they see fit and in reality this is true BUT, let's say I'm the old lady. I will not likely pick up my pace when you speak to me that way. I will not care in the least what you're in a hurry for and will almost always slow down even more. Your words will fall on deaf ears and if such verbal abuse continues, I'll likely bust you in the head with my bag. SO, what did your freedom of speech get you?
Apply that same scenario to today's many events and think, does anyone (particularly the opposition) actually hear what people are saying when they speak this way? Do they feel like trying to work with that person to come up with a resolution or are they now immediately put in defense mode? Have you helped your cause in the least? In my humble opinion, no.
Freedom of speech was intended to allow people to have an opinion without being persecuted or censored which to me means edited, NOT be given a free pass to verbally assault anyone they feel.
Back to the old lady...I consider more the child standing down the way listening to someone berate the poor woman and how they are perceiving humanity. Have they learned something about freedom of speech or how to be a horrible human being?