No, it's not appropriate. Saying, "John supports this, but this is our difference in opinion" would have been appropriate. But lying is never appropriate. I don't believe Sarah to be a liar, I just believe her to be wrong on this issue which is a very important issue.
But you've lied by omission.
Why did you post an incomplete interview which omitted the excerpt of Palin stating she did NOT "favor an amnesty for the 12 or 13 million undocumented immigrants"?
I don’t think there is a single major political figure who supports deportation. If you know one I’d be interested.