This has nothing to do with the freedom of speech, which protects you from the government silencing you. The "leftist jewish groups" are using their freedom of speech, ironically, to silence her. It's like boycotts to get someone to apologize or be fired for an ignorant statement, but her freedom of speech is not under attack. She's no Lenny Bruce. On another note, she is a shande.
Report: Palestinian, 18, killed in clashes with IDF in West Bank (Haaretz)
from the article: U.S. Jewish groups call on synagogue to cancel anti-Muslim speaker