sharma and rita most likely live their lives secured in their homes protected by locks, secured doors and windows. most likely they do not come home every day to find strangers in their homes, eating their food, using their utilities, and taking their money. if sharma and rita ever did find strangers in their homes, most likely they would call the police to have the strangers removed and arrested.
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yet, for some reason, sharma and rita write that this nation should not be allowed to protect its borders, its citizens and provide for internal security in the same just manner. borders should be secured from illegal penetrations. internal homelands should be secured against non-citizens entering or remaining illegally in the nation. 
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legal immigration, legal residency and legal transient travel requirements are just, humane and necessary to protect the nation's borders and citizens.
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better to reject hypocritical knee jerk screeds spreading hate and fear.