Why do people think Romanians and Gypsies are the same thing?

Is it because of the Gypsies ethnic name "Romani" sounding so similar to the term "Romanian"? Is it because of Romania having a noticeable population of Gypsies?

Whenever I hear hateful comments about Romanians, it's often remarks like them all being "poor" and "thieves", all of which are negative perceptions of Gypsies all over the world.
Why do people think Romanians and Gypsies are the same thing?
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