Try opening your mind as well as your heart and look beyond the vicious venom spewed by the likes of Christopher Hitchens....your judgment is at once unfair and unsustainable.

You may wish to start with:
http://aleteia.org/2016/04/05/5-responses-to-the-ridiculous-reasons-some-atheists-hate-mother-teresa/

http://www.nybooks.com/articles/1996/09/19/in-defense-of-mother-teresa/

https://www.thestar.com/opinion/letters_to_the_editors/2016/09/10/more-voices-on-mother-teresas-sainthood.html

http://www.thehindu.com/opinion/lead/the-mother-teresa-her-critics-choose-to-ignore/article5058894.ece