ECHR at: http://www.hri.org/docs/ECHR50.html
(cf UDHR at http://www.hri.org/docs/UDHR48.html )
As I see it, it's Article Five of the ECHR (Security of Person) vs Article Nine (Freedom of Thought and Religion). When articles clash in this way, Article 17 is invoked:
Nothing in this Convention may be interpreted as implying for any State, group or person any right to engage in any activity or perform any act aimed at the destruction on any of the rights and freedoms set forth herein or at their limitation to a greater extent than is provided for in the Convention.
U (Unrelated) : Linguistic Minefield: