just ranting about a friend

Idk she's just very blunt and the type of person who kinda go mess out her way to piss you off with her opinions or perspective. She says she respects others choices but idk. Like an example was last night one of her friends on fb posted a video of a live baby after an abortion. I don't know this friend btw. But it showed up on my feed because my friends comment said "don't ruin people's days like this." I ignored the video I don't really care about it. But then a few hours later, someone had commented "that's so sad" and so my friends comment to that was "I would still have an abortion tho." So after seeing that on my feed I stepped in and said "wow dude that's kinda mean of you to say." She goes "well it doesn't change my view on abortions blablabka I have the right blablabka." And I said "I don't care about what you believe or any one else I just find it ironic how you say don't ruin people's day and here you are saying a very offensive remark towards someone who is clearly prolife." And she just argued about how seeing stuff like that isn't guna change people's minds about abortion and I was arguing that it may not change her view but it might change someone else's. If it really didn't affect her the way she says, she wouldn't be arguing about it with herself. I was simply saying how rude it was of her to say a rude comment after her saying not to ruin people's days lol. And that's how she is with a lot of things. She argues with something different than the matter at hand. It's just so difficult to have a normal conversation because she always has to disagree with something and then argue about something else involving that topic and I'm just stuck confused at what the problem is and how I started something?