No one on the internet discusses politics in a good faith. Most of the time it's not even a discussion, since neither side listens to each other and they just want to regurgitate their talking points, feel good about having the supposedly "correct" take and then belittle the other party for being "wrong". These people are not going to change their beliefs no matter what you write or how well-researched it will be.

Then there are mobs. If you'll get even remotely popular there's a non-zero chance you'll end up getting stalked by some weirdos from twitter/4chan. Lots of these people have close to infinite free time, no moral compass whatsoever, nothing better to do and possibly a mental illness that makes them obsess over certain topics. They will spread misinformation about you all over the internet or will try to get you fired from your current job over something you wrote 7 years ago. If you use your real name they'll quickly find out whatever they can about you and use that to harass you or your family.

Personally, I refrain as much as possible from posting about anything political on the internet, real name or not. It's a huge waste of time that adds nothing positive to a daily life.