https://asiatimes.com/2024/08/vietnam-becoming-a-chip-making-powerhouse/
Vietnam is becoming an important new player in the global semiconductor industry, a decoupling beneficiary of the US-led chip wars against China.
https://www.rand.org/pubs/commentary/2023/10/can-vietnam-help-america-counter-china.html
I don't think Washington's ghouls would be saying these kind of things if Vietnam didn't matter to them. As far as the US is concerned, any independent nation that could be a regional/ global power is a threat by default.
Even just a country existing independently by themselves is already enough for them to do whatever they can to demonize and attack them as such an independent country will be a symbol of hope for other countrries wanting the same.