How do Jewish people feel about Jehovah's Witnesses?

Answer 1

Unless there is some pressing reason, we don't comment upon how non-Jews worship or what they believe; and nor do we proselytize.

Answer 2

Jews do not see Jehovah's Witnesses in any way different than they see Christians in general, which is that Christians are entirely entitled to their religion and way of life - it just is not the Jewish way. However, since Jehovah's Witnesses proselytize more openly, especially in Jewish areas, Jews have a slightly negative view towards them on account of the proselytizing. If Jehovah's Witnesses did not proselytize to Jews, Jews would have no opinion of them for or against.