When is it Acceptable to Compliment Terrorists?

Minnesota's Star Tribune reports:

A [Minnesota Democrat's] campaign for the state House abruptly ended Sunday morning within hours of him posting on social media that ISIS "isn’t necessarily evil" and is "made up of people doing what they think is best for their community."

Washington state's Patty Murray made similar comments about Osama bin Laden in 2002:

He's been out in these countries for decades, building schools, building roads, building infrastructure, building day-care facilities, building health-care facilities, and the people are extremely grateful. He's made their lives better.

Murray did not resign. In fact, she subsequently chaired the Democratic Senatorial Campaign Committee and is currently the fifth-ranked Democrat in the US Senate.