You don't "know" what ideas will or will not destroy the nation, what I do know, is that the obstruction of the free flow of ideas will.
You mean the free flow of, not ideas, but people who believe as you do, don't you? Ideas are not trying to break into this country. I know that there is a self-evident truth and that is a house divided cannot stand.
Somewhere along the way, you'll have to pint out to me where I've argued against secured borders...here's I've never argued against them, yet, people with limited cognitive abilities (you may include yourself if you wish) continuously misrepresent the picture on any issue as actual support for the side they oppose.
I see the WHOLE picture, whether you do or not is indicative of your particular limitation, and not indicative of my support of the side opposite to yours.
Illegal aliens are exploited by consumers for cheap services, politician for votes, donations and support, and industry for cheap labor; it's always been that way, and it will always be that way.
Now, I am here, and this is my country, and no amount of self-righteous, bloviating from the likes of you will ever get me to back off my freedom of thought and expression.
And I can do it in two languages.
It's my country every bit as much as it is yours...and you can't do a thing about it.
P.S. If the Founders had believed as you do that a house divided can't stand, then they would not have given us the right and the freedom to stand divided.
I trust them far more than I trust you.