Yes, dear Elena. it is truth. In the time, when me was in Moscow, the Kremlin was closed for foreigners, because of national celebrations! The days before, even the Red Place was off-limits.
I know that during some national celebrations the Red Place and Kremlin is closed for all - admit nobody except in advance invited visitors. But I didn't know that don't admit just foreign visitors... Very strangely... I have photos of Kremlin :)
With regard to the Red Place you are probably right, dear Elena. I remember that also some Russian or Russian speaking visitors were not let pass to the Red Place. With the Kremlin all cash boxes were closed up to one. At the open cash box was a sign, that no tickets are sold to foreigners. But, so, I am not angry :-) There was so much other to see. And thus I have already one sightseeing target for my next visit in Moscow :-)))