I don't feel it is valid because it is rather nonsensical to group an entire country of 300 plus million into the same teaspoon of, at most, a handful of mentally insane killers.
It's not about saying everyone or even most people in the US are racist. It's about considering whether a visit would be marred by the current miasma of (institutional?) racism/anti-immigrant sentiment.
For example: would you, as a US citizen, choose to visit Iran vs going somewhere else?
For example: would you, as a US citizen, choose to visit Iran vs going somewhere else?