Laws do not justify themselves. Are we debating whether laws should be enforced or if the laws themselves are ethical?Because, like it or not, that's what countries do. Want to reside in country X, then you'll be obligated to live by its laws. No turn on red, pay an income tax, and serve in the military if it so determines. Don't like it? Then leave or suffer the consequences. Simple as that.
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Besides, suffering the consequences of noncompliance with government mandate is something JWs have done before. They were specifically targeted for arrest, imprisonment and execution in Nazi Germany, after all. Didn't stop them.