The ADL recently bashed Glen Beck because he's been critical of Soros. By criticizing Beck, the ADL sort of endorsed Soros.
They have already shown that their priority is being an ideological organization. Their focus tends to be on bashing Beck, Limbaugh, etc.
That type of behavior resembles the radical group known as Media Matters, a radical group.
You should keep calling them extreme. You'd be justified in doing so.