Artist, how do you judge my take on this situation?

So I have this friend who has been a very close friend of mine that I've trusted my feelings with, they are usually really nice but when they are upset by something they don't confront people.

They have a rant twitter where they write things that have bugged them, I ended up on that twitter because I was tagged in a post with art without a source.

It's a really sensitive thing for them since they have seen a lot of artist go uncredited and they ended up getting really mad about it, this is where our conflicting principles are.

Mine are- if it's not your art don't say it is and it's good to source it art can be shared and if that artist doesnt even know you exsist or are posting that one art they did, it's no harm as long as you're not claiming it's yours and your not selling it.

I rarely post things that aren't mine, I do support my friends that are artist and I even draw myself, if I found someone was using my art I wouldn't care, in fact I would feel glad they like it.

But they have the total opposite opinon, like if my friend even posts 3 pictures without sourcing the artist they get really mad, and they got mad cause no one said anything to me about how it's unsourced and not mine.

I feel mad they are complaning about me but I also do feel bad because I'm sure they feel like I didn't listen to them.

In the end I want us to continue to be friends, I learned from my mistake and I won't post anything that isn't mine so

I want to know what you guys think