The rule of law, and the notion that we have a "government of laws, not of men" are principles of this country's Founders.
Were they "liberals"?
The Constitution guarantees criminals a right to due process.
Is the Constitution a "liberal" document?
That's the government. Was there a government agent present when those thieves broke in to Mr. Smith's home? No? Then via the 10th Amendment those powers devolve to Mr. Smith.
The Constitution guarantees criminals a right to due process.
In a court of law. Were those thieves charged and Mirandized by a court Officer? No? Then your argument does not apply.