Ignorance over how Western gestures or attitudes are read in the Middle East, specially in Iran and the Arab world. Wishful thinking, "Yes we can" and "I have a dream" work in the land of the brave and home of the free, but not necessarily elsewhere. Iran sees that it can further clench its fist with no consequences whatosoever. So does Turkey, Syria, and all the terrorist proxies of Iran. Only Pakistan is acting against terrorism as it sees a pattern of determination by Obama.
Law expanding definition of terrorist activity passes first Knesset reading (Haaretz)
from the article: Top Republican: Obama 'charm offensive' won't halt Iran nukes