According to the Encyclopedia of World Slavery by Junius Rodriguez, about 5,000 Jews owned one or more slaves (out of 20,000 Southern Jews), representing about 1.25% of all slave-owners in the South.

Yes, there were Jewish slave owners. Most of them were relatively small-scale slave owners--maybe they'd own a slave or two to help out in their business. There were Jewish merchants who bought and sold slaves, just as they bought and sold other products. What there really weren't were Jewish plantation owners, which was where slavery was really entrenched. There are only a handful (like 2 or 3) documented cases of Jewish plantation owners, but many more of Jews in the south owning slaves as domestic servants or to work in their business. Like non-Jewish slave owners, some treated their slaves relatively well and wanted to manumit them when legally possible, others were not so kind.

What's important to remember here is that prior to the mass immigration of Jews to the US in the late 1800s, the Jewish community in the US was both quite small and relatively assimilated. At this point in Jewish history there really wouldn't've been a distinctly Jewish view on much of anything (beyond religion) among American Jews. Jews in the south did normal southern things, and that included slavery.

As /u/Jewbilant said, there were definitely Jewish slave owners in America. One interesting Jewish slave owner was Judah P. Benjamin, who owned a plantation with 140 slaves until 1850, and later became a Confederate cabinet secretary and Vice President. He's even featured on some Confederate money. More info here.

Jews, like everyone else, were divided in their opinions on slavery. One famous Rabbi, Morris Raphall wrote an infamous article insisting that slavery is supported by Jewish law. You can read a bit of his piece, along with a contemporaneous rebuttal, here.

This site gives data from the 1860 census, and appears to be well cited. It looks like it averages around 1/3rd being slave owners.