We have a moral obligation not to submit to truly unjust laws.
I look at it this way, if I submit I am likely subjecting my children and grandchildren to tyranny. My rights come from God, not from the Marxists seeking to impose their will upon me.
Just as I served my country and was willing to sacrifice my life for liberty, so too should I be willing to suffer or sacrifice for the sake of liberty. Someone has to do it as others before have done it.