To keep us safe from the aliens, the first steps will be to shelter in place and wear masks. After that, it will be revealed that they have been waiting for us to adopt diversity and to get serious about climate change. People will believe it.
Sadly, there are some who would.
You left out the need to be vaccinated with an experimental genetic therapy serum against alien microbes ...
Yep. Just as during the Cold War, those who believed there were aliens among us also believed those aliens were here to warn us about the dangers of nuclear warfare, and to encourage global peace.
Yep. Just as during the Cold War, those who believed there were aliens among us also believed those aliens were here to warn us about the dangers of nuclear warfare, and to encourage global peace.