I've never been to hear a sermon in a mosque. I know that there have been sermons in mosques denouncing terrorism. I knon there have also been sermons in churches denouncing terrorism including terrorism carried out by "our side".

Terrorism, in my definition - and it's a definition consistent with how the word has been frequently used, and with its origin describing the activities of governments - is activity which is aimed at achieving some political or military objective by the use of methods which intentionally kill or injure non-combatants and innocent citizens.

Taking people prisoner and killing them is terrorism. Exploding bombs aimed at killing civilians is terrorism. People who organise such activities are terrorists.

That applies to the people on "the other side", of course it does. But nobody here is saying that they are right to do these things. There are people who apparently believe that it is right when "our side" does them.