Approve - to speak or think favorably of; pronounce or consider agreeable or good; judge favorably: to approve the policies of the administration.
It seems that the giblets are confusing the two words above. The call for tolerance, but what they really want is approval.
As Mandy Patimkin said in “The Princess Bride”, “I do not think that word means what you think it means.”
You point out a very, very important distinction:
Society and civil jurisprudence can promise tolerance. They cannot promise approval.
They also cannot promise celebration; nor the preclusion of LEGITIMATE COMPETING IDEOLOGIES (such as the promotion of traditional marriage).