The Y is really not a Christian organization any more.
Then change the name.
Worse than that, many other Christian organizations are not Christian in the Biblical sense anymore. Many of them are redefining homosexuality and transgenderism as acceptable lifestyles. (sigh)
Our local Y SCRUBBED the Judeo-Christian precepts from its mission statement. Some of us members put up the redacted wording on ebay, as a protest.