I believe you are referring, at least in part, to my post 24 although you didn't observe the courtesy to quote it. Just what exactly do consider "ridiculous" or "nonsense" ?
In post 24 I was attempting to be clear about the term "multiculturalism". It can mean countries that have been historically bi/multicultural like Belgium, Canada or Switzerland. This is contrasted to countries like the USA which have been historically been monocultural but which are open to immigration. By the way, there is no compulsion for any nation to be open to immigration under International Law except perhaps in a limited sense for humane reasons.
I suggested that if a country chooses to be open to immigration, it has a right preserve its culture as it chooses. You may be of a different opinion, but that does not permit you to assign opinions (or facts) epithets such as "ridiculous" or "nonsense" because you don't agree with them. This is a violation of PF rules as I read them. If you want to quote specifics and offer a reasoned critique, then do so. Otherwise keep your opinions to yourself.