A platform of hatred. A plethora of racist, misogynistic and transphobic remarks. But through it all, many stood by far-right troll Milo Yiannopoulos, often defending his right to free speech.

Over the weekend, however, the Breitbart editor finally crossed what may have seemed a non-existent line, sending the American Conservative Union, publishing house Simon & Schuster and others who once supported him running.

The breaking point: defending pedophilia.

Video surfaced Sunday in which Yiannopoulos appears to condone sexual relationships between adults and 13-year-old boys, saying, “We get hung up on this kind of child abuse stuff.”

Despite a “note for idiots” on Facebook in which Yiannopoulos attempted to clarify what he said, and a subsequent post in which he took some responsibility for his comments, the fallout has been swift.

He was disinvited Monday from ACU’s annual Conservative Political Action Conference, where he was scheduled to speak along with Vice President Mike Pence, White House Chief of Staff Reince Priebus and President Donald Trump’s strategist Steve Bannon. The group’s president, Matt Schlapp, said Yiannopoulos’s response on Facebook was “insufficient.”

Simon & Schuster announced later Monday that it had decided to cancel the publication of Yiannopoulos’ upcoming book, Dangerous.

Among his other deserters was “alt-right” Twitter personality “Baked Alaska.”

I am Milo's former manager.



I have defended Milo for standing up for free speech on many occasions.



Today, I cannot defend Milo anymore. — Baked🥛Alaska™ (@bakedalaska) February 20, 2017

Yiannopoulos’ offensive verbal assaults have been plentiful. Among the more memorable was a racist attack against “Saturday Night Live” and “Ghostbusters” star Leslie Jones, for which he was permanently banned from Twitter.

Violent protests this month shut down his planned appearance at the University of California, Berkeley, campus.

Unsurprisingly, many took to Twitter on Monday to blast the ACU and others, pointing out their willingness to ignore Yiannopoulos’ bigotry ― up to a certain point.

@AdamRothberg @simonschuster @threshold_books so to clarify: racism and transphobia = worthy of a book contract. pedophilia = not? — Richard Lawler (@rjcc) February 20, 2017

So the line is pedophilia. Everything else is okay.



"CPAC boots Milo Yiannopoulos over pedophilia comments" https://t.co/Z3hUTJZCql pic.twitter.com/anUG4fBqxR — Peter🌹Coffin🔑 (@petercoffin) February 20, 2017

If it took this for you to consider Milo Yiannopoulos disgraceful, only you know why. — Jamil Smith (@JamilSmith) February 20, 2017

It's now established Milo Yiannopoulos is allowed to be sexist, transphobic, & anti-Muslim but the red line for prejudice is paedophilia. — Rori Donaghy (@roridonaghy) February 20, 2017

So where are the free speech defenders of #MiloYiannopoulos NOW? So his vile crap was cool before. Now pedophilia is bad? #tcot — rolandsmartin (@rolandsmartin) February 20, 2017

But now that #MiloYiannopoulos & his praise for pedophilia has come out, NOW y'all say he has crossed a line. So all else was fair? #tcot — rolandsmartin (@rolandsmartin) February 20, 2017

My understanding from Twitter is that today is the day many new people came to the conclusion Milo Yiannopoulos is a real piece of shit. — John Scalzi (@scalzi) February 20, 2017

The Milo Test: Anti-Semitism, ok. Racism, ok. Alt Right, ok. .Advocacy of pedophilia? Is THAT the bridge too far? — Charlie Sykes (@SykesCharlie) February 20, 2017