This is a really thorough, clear, explanation of the religious exemption in Minnesota’s freedom to marry bill. Dale Carpenter has been an expert voice on this issue for years.
TL;DR: Whatever concerns you have about religious exemptions surrounding same-sex marriage are actually concerns about the Minnesota Human Rights Act, and extending marriage to same-sex couples doesn’t change anything on those grounds.
This was published in the St. Paul Pioneer Press. Which means you probably won’t be able to access this op-ed in a few weeks. So if you’re not reading it right now, Instapaper it or put it wherever you put those sorts of things. It’s such a good reference, I’ve saved it so I can refer back to it.