If all you did in this or any article was to express your opinion, weighing in to register your support for one side or the other of some current controversy, that would be your right. Free speech, etc. And someone else would have an equal right to take the opposite position.
But you're a writer, not some blowhard with a bullhorn, so you go beyond opinion into rhetoric, explaining WHY you feel the way you do. You offer arguments--logical, ethical, or emotional reasons--that explain and support your views.
What's more, you demonstrate the virtue (sadly scarce these days) of humility--you acknowledge that your opinion, no matter how well supported, is just your opinion. You don't suggest that anyone who disagrees must be a libtard or a RWNJ.
In other words, in my opinion, you're doing public discourse as it should be done.