The Rahnerian claim made herein is worn out and due for retirement.  The Mass appears on a superficial level to be "European" because Europe was shaped for nearly two millenia by Christianity, not because there is anything peculiarly European about it.  The Mass is in the same way Mexican or Filipino: cultures shaped by Christianity.

And saying so is not to speak out against organic inculturation.  Which may be facilitated by collegiality, but the ICEL debacle still shades this discussion.  In 1998 ICEL was still trying to give English speakers a theologically and ritually deficient Mass and in 1997 their proposed "translation" of the rite of priestly ordination was considered so theologically deficient as to be unsalvageable.  Collegiality, sure, but not collegiality as subterfuge or mechanism for deprivation of the faithful.  

With the necessary corrections in place renewed collegiality may present a way forward.  Or not--if it is abused by 1998 bitter-enders!