The focus comes from Trump's base itself. Such imagery is an expression of their worldview, and playing with it it makes it funny.
No patriotic American would stand for Trump as he has acted towards the USA in regards to Russia (as well as Netanyahu, Salman, Erdogan, and of course, his true love, Kim). From Helsinki to this week, and the rest of the endless flotsam between, it's been beyond appalling.
America is supreme, not some subservient sycophant sniveling in their shadows as Trump has been trying to make us into.
We were born from the call to stand against those who would rule us for their own selfish interests and without paying us heed. Just because this absurd cult has emerged around a tv show huckster does not mean that Right which was paid for in blood has been voided. It was apathy that got him into the Office, and it will be apathy that will be our damnation if patriots do not make a stand.
While there's still time.