I'm sure the US government would have been real keen on you reading Kremlin news source 40 year ago...

there were multiple Kremlin propaganda outlets you could read in the US 40 years ago, although it is true that (IIRC) there were restrictions on broadcast television

It's legal. We have that right.

It's still uncontroversial in the US, where RT remains widely available, although their local TV operations folded after a boycott by cable providers.

Don't get me wrong, if you really want to watch it, I think you should be allowed to.

Personally I'm undecided about whether these channels should be publicly available on e.g. free TV channels, but that's getting off topic.

15 years ago watching too much Taliban propaganda would have put you in Guantanamo pretty fast

you earnestly think that is true of an american citizen in 2009?

if they were muslim? without a doubt