Russia was overthrown with 300 men from the lower east side of New York, funded with 30 million dollars. We have allowed millions of military aged men into our country with no means of support. If you feed them, house them and arm them, how will they be stopped if they have been recruited and are here to overthrow America?
Since they all have 10 kids each that WE are paying for, i would say quite a few.
They won't be stopped. They will be used by our rulers as replacements for the defunded police departments and the reduced military force. They will call it "a path to citizenship".
Illinois has just changed their laws to allow non-citizens to be hired as police officers. This practice will spread rapidly to other "blue" States. It is an evil portent for the future.
The new guys will have no trouble putting down revolts by the native population with maximum force. It is a time-tested strategy used by rulers for millennia. Our current rulers are going down the same path.