" 

 The ""why"" is already explained in the body.  The ""why"" is not required, and fact discouraged because leads are supposed to be concise.  The fact that this org is labeled an anti-gay hate group in the lead already is more then enough to let the reader know that they probably do or say things that are hateful to gays.  To add it to the lead without the ""why"" having sufficent weight is a POV edit.   "