The writer's intention: protest against a barbarous custom.

Said barbarous custom exists in the writer's own country in a less modified form.

European communities, as a result of their good sense and good taste, would sanction a more-modified form of the barbarous custom
elsewhere.
.....
..........
.....................

So, it seems to me that a distinction is being made between the writer's country and European communities; but, it's very vague and hard to tell.

What book is this?

*Back in English/Composition class*

Never use weak verbs – "It has been the intention of the writer…"
Should be "the writer intended…"

The writer's intent is to record his protest against a barbarous custom; European communities sanction/approve of a modified form of this custom, but alas, the writer's own country allows this barbarous custom in a less modified form. For shame.

Or something like that. This isn't even saying that European communities practice this custom, just that they would sanction it "elsewhere" in a modified form. Perhaps like the American "We won't do it HERE, but we'll let it happen there."

Bad writing makes me sad. Stop trying to be "interesting" and just say what you bloody mean!

It sounds to me like a translation that was either written pompously or translated to be so. I've seen similar texts from translations.