Ratna, I have never heard such a rubbish reason for the IDF not to pursue the action. The whole region is volatile, as you should know, and no one wants a war to start, certainly not now, and that goes for Arabs and Israelis alike!!
CNN Turk: Turkish planes hit PKK targets in southeastern Turkey, northern Iraq (Reuters)
from the article: UNIFIL vows to ensure calm after four rockets strike Israel from Lebanon