Whichever civilisation has the most contact with others would only be expected to think most about the implications of that contact. In any case, I am not sure tolerance of the European liberal sort is a self-evident virtue.
Tolerance is very different from abdicating judgement and a synthesising project altogether.
I suppose there is an existential question here about whether the diversity of human social formations has merely aesthetic appeal per se, or whether the primary long-term aim is to offer insights for building a higher civilisation blending the best of all worlds. As all will realise, I take the latter position myself. I have doubts about the Huntington-like argument regarding the enduring differences among civilisations, for it ignores two considerations. Second, we are arriving tragically quickly at the point of global homogeneity, whether we like it or not. We are going to end up with a single world civilisation all too soon if we persist in a relativism-induced abdication of moral judgement, a world civilisation that takes what always have been considered the worst parts of human nature and holds them up for worship.