Actually, the Human Rights Campaign paper that was linked in the article makes it clear that it was NOT claiming that the 21 victims it cites were murdered for being transgender. In the one specific example -- the murder of a homeless person in Vermont -- investigators expressly do not think that the victim's transgender status was the motive for the murder. See http://www.cbsnews.com/news/4-arrested-in-california-in-slaying-of-vermont-transgender-man-amos-beede/ 

Any murder or other crime is a tragedy and the victims deserve our sympathy. They also deserve better than being turned into propaganda for a political agenda that doesn't fit the facts.