Suppose the context is people giving their opinions in a discussion.
How are "view" and "viewpoint" different? Some dictionaries seem to say they are the same. What do native speakers think?
I think this is a case where most natives don't think that hard about these words and use them almost interchangeably.
Having said that, if I were to draw a distinction, I'd say that a view expresses what is seen and that a viewpoint expresses the position from which the viewing occurs. Quite often though, what is seen is tightly coupled to where you're looking from.
Therefore somebody's view on a subject lays out their observations and conclusions. Their viewpoint (in the vernacular- where they're coming from) informs those observations and conclusions.
Somebody's views on pit bulls might be that they should be made illegal. They might think this because their viewpoint is one of having had a child mauled by a pit bull.
Someone else might have the view that pit bulls are not inherently dangerous and that they can be as sweet or as ill-tempered as any other dog based on how it was raised. They might think this because they're coming at it from the point of view of having grown up with a pit bull as a family pet that was the "sweetest most well-behaved dog ever".