http://commons.wikimedia.org/wiki/COM:PS "Private image collections and the like are generally not wanted. Wikimedia Commons is not a web host for e.g. private party photos,
Sorry, but I don't see how this applies to this specific case. Apart from the holocaust-denial connotation of these so called cartoons, the contest which they came out of was fairly well publicized in the media. So there is some encyclopedic relevance to it. And by the way I'd be the least worried that these images attack Ariel Sharon, its scope is much broader.
Please compare this with http://en.wikipedia.org/wiki/Image:Jyllands-Posten-pg3-article-in-Sept-30-20...
We sould apply the same standards to the holocaust-denial cartoons as we do to the mohammed cartoons. That means showing them as a fair use version, and thus due to licensing issues not on commons but on wikipedia, where they are used in an appropriate context accompanied by a critical discussion.