When I read online opinion pieces, I am very tolerant of wildly different points of view. I figure I can always learn from the way someone else thinks, even if I disagree with their conclusions.
But I’ve noticed that as soon as I encounter bad grammar, I immediately stop reading. My thinking, more or less, is this: If you don’t know how to put together an English sentence properly, you should at least have the good sense to ask someone to check your work.
And if you really don’t care about proper communication, then don’t expect me to care about what you have to say. People, let’s at least use the language properly. Without language, where would we be?