Does the LDS church discriminate against sexuality, race or nonnuclear families?
Since this is not my area of expertise, I searched Google under the key words "'LDS church' sexuality" to get these possible sources:
http://www.jefflindsay.com/LDSFAQ/love.shtml
http://en.wikipedia.org/wiki/The_Church_of_Jesus_Christ_of_Latter-day_Saints
http://www.bilerico.com/2007/11/lds_church_changes_position_on_samesex_l.php
http://www.freerepublic.com/focus/f-religion/1872631/posts
You can do the same for "race" and "nonnuclear families." In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.
I hope this helps. Thanks for asking.