Tolerating the intolerant: Holland

Holland has a reputation for being the most tolerant of countries. However, managing an intolerant group poses difficulties.
How does a society accomodate a group, or perhaps a sub-group, that advocates death to it's critics? To be consistant, I suppose the Dutch could treat militant islamists the same as it treats facist skin-heads.

It might also consider refusing immigration priveledges to those who do not sign an endorsement of the Dutch bill of civil rights.