Why are foreigners like this allowed to live in the US, they are trying to ruin our freedom. Our country🇺🇸?

Why are foreigners who express anti US senti allowed education or even the opportunity to live on our soil. This is espionage on an educational level. They are trying to ruin the US. One guy even said that "even tho Hillary Clinton might be shady and possibly a criminal it's better than trump" lmao tf? You can't make this up!
It's even more comedic when Chinese nationals comment on our country when it's own is possibly the 2nd to worst country to live in, in the world.

Why are they allowed to live here?
Why are foreigners like this allowed to live in the US, they are trying to ruin our freedom. Our country🇺🇸?
Why are foreigners like this allowed to live in the US, they are trying to ruin our freedom. Our country🇺🇸?
Why are foreigners like this allowed to live in the US, they are trying to ruin our freedom. Our country🇺🇸?
Why are foreigners like this allowed to live in the US, they are trying to ruin our freedom. Our country🇺🇸?
Why are foreigners like this allowed to live in the US, they are trying to ruin our freedom. Our country🇺🇸?
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