It would therefore be rather poor, if not misleading, to have a one-size-fits-all approach to the challenges each society needs to rise up to.
The fact is that eventually a national identity was born bonded by language, religion, costumes traditions, architecture, etc.
Such type of immigration flows do pose too many unanswered questions until it is too late to properly address them.
Potentially it does store up future misunderstandings ultimately leading to trouble.
Europe does need most immigrants already in and will likely take in some more in decades to come.
Uncontrolled immigration certainly does endanger societies anywhere, especially if communities espousing radically different values become so entrenched as to attempt to overwhelm local values - latus sensu.
Totally unacceptable by any reckoning.