As is not infrequently the case there does seem to be more to the story, and in context what he said changes a bit.
According to The Associated Press:
Jon Stewart frequently poked fun of Sanchez (who is Cuban-American) on his program referring to a tweet Sanchez had received earlier this week from House Republican leader John Boehner as a case of "send a twit a tweet."
In a satellite radio interview with Pete Dominick, Sanchez said "He's [Stewart] upset that someone of my ilk is almost at his level," and that Stewart "can't relate to what I grew up with," saying his family had been poor and he had seen prejudice directed at his father. And that Stewart is bigoted toward "everybody else that's not like him."
When Dominick said that Stewart, as a Jew, is also a member of a minority group.
Sanchez said "I'm telling you that everyone who runs CNN is a lot like Stewart, and a lot of people who run all the other networks are a lot like Stewart, and to imply that somehow they, the people in this country who are Jewish, are an oppressed minority? Yeah."
"I can't see someone not getting a job these days because they're Jewish.
I honestly can't see the above as being anti-Semitic