answer:
Here is a good source of very recent information on public opinion in EU countries on discrimination. This addresses your question about "what are the countries in europe with the least discrimination against arabs and muslims ?"
This is part of a large EU survey called "Eurobarometer" -- see the report under the section: Discrimination in the EU in 2009.
The fact sheets are summary info on each EU country
Germany ("DE"): http://ec.europa.eu/public_opinion/archives/ebs/ebs_317_fact_de_en.pdf
Italy ("IT"): http://ec.europa.eu/public_opinion/archives/ebs/ebs_317_fact_it_en.pdf
