This racism had had different shapes in different cultures. Sometimes it was blunt and open, sometimes it is hidden behind morally appealing smokescreen.
In Europe today, it is hidden behind the human righs for "Palestinians". But the message is clear: it is free season to attack Jews under guise of attack on Israeli domestic policies.
Sadly enough, many self-hating Jews and "people born into Jewish families" are activelly supporting racists.
Compared with them, David Irving is small fry.