The big difference:
Oreo’s poster was simply a wall post on its Facebook account. It did not donate money to taking away or hindering the advancement of civil rights.
Chick-Fil-A, on the other hand, donated (at least) $5 million to anti-gay groups, “reparative” therapy groups (which the American Psychological Association have condemned), and most terrifying of all, the Family Research Council, an organization that used Chick-Fil-A’s donations to sponsor a bill in Ugandan legislature that was aptly named the “Kill the Gays” bill.
This is not an issue of free speech. This is not an issue of religious freedom. This isn’t about “political beliefs”. It’s about the government’s duty to stop discrimination, in all of its forms. This is about equality.
So fuck you and your greasy chicken sandwiches. I hope you enjoy your hardened arteries and heart disease.