You have zero idea what you are talking about. I support free speech, but that doesn't mean I am going to allow the KKK to do their demonstrations on my front

You have zero idea what you are talking about. I support free speech, but that doesn't mean I am going to allow the KKK to do their demonstrations on my front lawn because "free speech." Disallowing that is not "stamp[ing] out free speech." Not even in the slightest. Its a two way street - they are free to do their cross burning elsewhere and I'm also free to put signs on my lawn that support racial harmony. Walmart (or whoever) is free to decide they don't want to sell the Confederate flag. The Daughters of the Confederacy (or whoever) are free to decide they want to sell the Confederate flag. Neither is stamping out free speech. BOTH are practicing free speech. Free speech (as a value) doesn't mean "I need to facilitate everyone else all the time, always and so does everyone else." Free speech (as a value) means "you let me say what I want and I let you say what you want." The KKK can do their own thing and American Atheists can do theirs. I can choose to hold an atheist convention and disallow priests to speak. Priests can choose to hold Mass and not allow atheist to speech. Its each party's choice. If some types of items are unpopular with the public (or unpopular with the people who choose what to sell) it is a business decision to not sell them in order to appeal to their chosen demographic. It is not "stamp[ing] out free speech." There are niche markets everywhere for items that don't appeal to the general public. Most companies you are hearing about (Walmart, Sears, Apple) are trying to appeal to the masses. Being forced to support everything is the exact opposite of free speech. Let's also distinguish "the law" from "the Constitution." They are different.