the author indicates two motives for writing Persepolis. What are they?

Here is the quote I found from the introduction,

From the time I came to France in 1994, I was always telling stories about life in Iran to my friends. We'd see pieces about Iran on television, but they didn't represent my experience at all. I had to keep saying, "No, it's not like that there." I've been justifying why it isn't negative to be Iranian for almost twenty years. How strange when it isn't something I did or chose to be?

After I finished university, there were nine of us, all artists and friends, working in a studio together. That group finally said, "Do something with your stories." They introduced me to graphic novelists. Spiegelman was first. And when I read him, I thought "Jesus Christ, it's possible to tell a story and make a point this way." It was amazing.