You have entirely misunderstood that post. It is GitHub which was acquired by Microsoft, not Samourai. The only coinjoin implementation which bans certain coins is Wasabi.
I've read somewhere that the US Treasury Department wants to target crypto mixers as they can be used by Hamas for money laundering/terrorist financing.
This is just the usual nonsense from the government misusing some current event to justify their mass surveillance machine. The evidence shows Hamas have raised barely any money via cryptocurrency:
https://nitter.cz/nic__carter/status/1717210060777009636#mOne can only imagine the US government will eventually "ban" Bitcoin like it banned Gold a few decades ago.
Good luck confiscating bitcoin like the confiscated gold. I unfortunately lost all my private keys in an unfortunate boating accident.