Now why, you may ask, is it necessary for an orthodox synagogue to hold this function? Isn't it enough to recognize the legacy of Dr. King, and treat all people with dignity and equality? You my unenlightened friend obviously don't understand "open-minded, modern-orthodoxy." The liberal, modern-orthodox, Jew feels a burning need to atone for the sin of x-tian slavery. And what better way to engage in this "tikkun" than to host an annual church choir in the synagogue? They even had Neshama Carlebach singing niggunim.
Can you feel the holiness? I can't.
The only way to truly get "high", is to elevate the soul with the intellect, by studying the Torah. The Rambam speaks about a supremely elevated state whereby a perfected man becomes almost "lovesick" (so to speak) for Hakadosh Baruch Hu. This should be the model for the authentic "spiritual experience", unattainable as it probably is, for most of us. An elevated level where one is totally immersed in the knowledge of Hakadosh Baruch Hu. Not some "mystical" experience of goyish paganism. Shabbat Shalom.