Two words

Emma Green wrote a scathing article a few days ago in the Atlantic about the Anne Frank Center for Mutual Respect.
'Rapaport, the organization’s new board chair, said it is neither a Jewish organization nor a Holocaust organization.'

Today I was reading the about page of the Anne Frank Center for Mutual Respect and came across the following sentences.

'Anne Frank for Mutual Respect is a Jewish voice for social justice dedicated to the Jewish principle of Tikkun Olam, repairing the world. For us, that means advocating on behalf of all communities, Jewish and non-Jewish alike.'
http://annefrank.com/about-the-center/ 

The April 16th version of the about page did not have those sentences which means they were added recently.

I am sick of this overused phrase of Tikkun Olam and don't have plans to donate to any organization that uses these words to justify its existence. The twitter page of the center is replete with tweets calling out President Trump and his administration while a Facebook posting in January thanked President Obama for advancing mutual respect.

“Tikkun olam” has become such a commonly used term in liberal Jewish circles that it is the basis for a joke, in which an American Jew visiting Israel asks her guide, “How do you say tikkun olam in Hebrew?”
http://www.myjewishlearning.com/article/tikkun-olam-repairing-the-world/

Where does the concept of tikkun olam (repairing the world) originate, and is it a mitzvah (commandment) or does it hold the same level of importance as a mitzvah?

For Jews those Mitzvos include not simply socially or politically correct precepts such as giving charity and engaging in political action, but also observance of the Sabbath, dietary restrictions (Kashrus), daily prayer, and other commandments which seem to have fallen out of favor and are ignored, if not openly denigrated and violated, in some segments of the community, as they substitute the false panacea of something they call Tikkun Olam for the authenticity of true Judaism, clinging desperately to Tikkun Olam to avoid their actual responsibilities as Jews to observe the Torah and the commandments.
Read more of this excellent article at http://www.jns.org/latest-articles/2013/6/3/the-fallacy-delusion-and-myth-of-tikkun-olam#.WQDp0YiGPIU=