There are a couple issues I see with this.
Firstly, is that is just liberal media saber rattling. Even if you DID do a nuclear a test, do you think it would change their mind? No, they would probably just say that it was one of the only functional warheads that Russia had left and that now that they used it they must have nothing left. See: Russia is running out of ammunition stories that ran for years.
I have plenty of issues with the US military and I am continuously skeptical of their actual capabilities, but I think it is fairly reasonable to assume that they have intelligence on their enemies’ weapons programs. They are probably reasonably aware of Russian nuclear capabilities and the fact that they do in fact have weapons that are functional. Maybe not exact numbers, but they should be aware of the fact that they exist.
Lately?
To be fair, I haven’t really used reddit since I migrated over here. But from what I remember it was always pretty islamophobic outside of leftist subs, though some subs tried to hide that more than others.