No, it's perfectly logical. Taxation is not a contribution. If you refuse to pay, you will receive threatening letters demanding payment. If you ignore them, eventually a case will be filed in court. If you ignore the summons and fail to appear, a warrant will be issued for your arrest and men with guns will come to your home to take you to jail. If you tell them you're not going and to leave your property, they will forcibly try to take you in. If you physically resist and fight back, they can and will legally kill you. That is taking money by threat of force, and by force if the threat isn't sufficient. That is theft, and it is immoral.

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"All truth passes through three stages. First, it is ridiculed. Second, it is violently opposed. Third, it is accepted as being self-evident." - Schopenhauer