Several questions are raised by this;

Since aliens aren't real, isn't a "fake alien invasion" a contradiction in terms?

While a "fake Trump assassination" might indeed be upsetting, would people be more upset to learn he was still alive?

Wouldn't the Emergency Broadcast System be broadcasting messages from President Biden; you know, the actual President? Why would there be messages from Trump?

I should go live in a dream world, it sounds very entertaining.

Your link is 'broke' (. . .2021/08//. . .) -- missing the day number ?

this link worked for me :

[united-cats.com]

The Department of Defense deeply regrets that we must inform you of the death of the above link.