Notice how I said "kinda" and "captures the spirit"?

No it (“There’s no difference between saying it’s ok to be gay and saying bad things about gays”) doesn't, not even "kinda".

In doing so he is also clearly trying to forward that you can't have one without the other (great moral theory without thoughtless bigotry).

Not so much that we can't have it - obviously we can have that in individuals, groups, projects - but that laws and social norms are too blunt to enforce it across society.

Altman:

It’s probably impossible to design a simple set of rules that will always allow the right speech and not the wrong speech

and

I wish we could figure out a way to just never allow hate, discrimination, and bigotry and always allow debate on controversial but important ideas. If that were possible, I’d support it. The distinction is usually clear, but the exceptions are sometimes critically important. Figuring out exactly where to draw the line is really hard.

You:

Altman also conflates the "people" that are bigots and the "people" who promote advancement in ethics and science. As if we can't tell the difference between Milo Y and Peter Singer.

Bullshit.