I'm inclined to agree with Alito's point that it really comes down to nitpicking about the way in which the town's employees went about selecting the invited religious leaders - it's one thing to criticize them for that and try to improve the practice, quite another to sue and drag it all the way to the Supreme Court. And they did show good faith by allowing two Jewish prayers, a Baha'i one and, last but not least, a Wicca one (albeit only after the Wicca priestess' particular request to be allowed to do so).
Of course, I say that as a citizen of a country in which priests are paid a wage by the government (as are rabbis, imams and a few other groups). Standards of what is acceptable and what is not in terms of separation of church and state vary widely between countries, depending more on historical factors than anything else - some elements in Belgium or Britain may seem like utterly unacceptable violations of the First Amendment by American standards, despite the US being far more religious than either one, while the reverse also holds. The important thing is that religious minorities are not legally discriminated against and are free to practice their faith.