Since the Mahommad Cartoon saga, a lot of ink has been spilled around the world trying to understand what are the limits to the 'right to ridicule.'
In the last year we have seen cartoons about the holocaust and cartoons against the christian faith.
The last in time is the Ratzinger cartoon, following the recent debates surrounding the pope's speech in Regensburg. You can view the cartoon here.
Even if the taste of the cartoon is arguably open to disagreement to say the least, there is no reason to ban it or to stop circulation.
Most importantly, this idea should be understood in the framework of reciprocity. Different faiths owe to each other mutual respect. If the condition of mutuality is respected, then dialogue will be possible. Without mutual respect, no dialogue is feasible. This is what ratzinger was trying to say, but some people wanted to misunderstand the message.