What do you mean by " Failed integration program "? Please Elaborate.
Are you saying that Europeans should have treated muslims like middle east treats it's migrants ( even muslim ones ), and should have denied them citizenship, and religious rights ( like muslims country do to followers of other religion ), and not recognized children born to immigrant parents ( like gulfies do )?
Well , since you are so certain about sins of Europeans , i agree with you on this matter. European multiculturalism is a failed experiment and they should have treated muslims like muslims treat them.