The kiss obviously was not meant in a sense of total agreement. The kiss didn't suggest carte blanche approval, it merely meant acceptance of those things which are true in the Koran, per Vatican II directives on ecumenism, and John Paul II's many comments in this vein. In other words, his actions have to be interpreted in light of his overall teaching, and that of the Church. You misinterpret JP's actions because you don't understand ecuminism, which is an effort to acknowledge partial truth wherever it is found. JP does this to bring awareness of the truths of the Catholic church to people who do not recognize Christ as God. That is his job.
I think that the burden is on you at this point is to tell me what you think the Holy Father meant when he did this... what his intent was. You argue that it is so obviously scandalous, etc. Okay. You are determined to assert that the pope is so obtuse and out of it that he could perform an act that you and some others around here immediately find abhorrent, one which gives aid and comfort to the enemy, and demoralizes the faithful, etc....that he could perform this and not see what you see so clearly? The choices are few at this point, as the inner logic of your claim confines you: either he was so dense that these factors never entered his mind, or he knew full well the scandal it would bring about, and did it anyway, or he is a dupe of the liberals, or one himself, determined to corrupt and betray the Church.
You say it is such a terrible thing, so tell me what you think was going through his mind when he did it?