EVERYONE has ignored your ridiculous flat earth conspiracy theories as to why.
Ideological zealots don't ask why. They aren't interested in truths which are complex. They are trying to sell something very simple... FEAR!
It's easy. Create a false framework and then inject some FEAR into it...
...a wide-open border...
False
A country without effective borders will cease to exist as a civil society.
existential FEAR!
Then just rinse and repeat... rinse and repeat... then get others to parrot the same thing over and over and over. Do it consistently and constantly for years and you can drive people crazy enough with fear to believe whatever BIG LIE you're selling them. Then you work on the other emotion that drives human beings which is love. We love you. We love you because you're very special, because you're one of us not one of Them... those OTHERS. It's been done time and again throughout history.
When you get called on spreading false narratives — and you will be — the solution is also simple. Just create a false equivalence and accuse the OTHER of something with unceasing repetition. Downplay, Deny, Deflect, Distract, Delude, and you can Disregard reality and the fact that truth is usually complex.