Section 4. Who are disqualified. - The following cannot be naturalized as Philippine citizens:Persons opposed to organized government or affiliated with any association or group of persons who uphold and teach doctrines opposing all organized governments;
Persons defending or teaching the necessity or propriety of violence, personal assault, or assassination for the success and predominance of their ideas;
Polygamists or believers in the practice of polygamy;
Persons convicted of crimes involving moral turpitude;
Persons suffering from mental alienation or incurable contagious diseases;
Persons who, during the period of their residence in the Philippines, have not mingled socially with the Filipinos, or who have not evinced a sincere desire to learn and embrace the customs, traditions, and ideals of the Filipinos;
Citizens or subjects of nations with whom the United States 2and the Philippines are at war, during the period of such war;
Citizens or subjects of a foreign country other than the United States 3whose laws do not grant Filipinos the right to become naturalized citizens or subjects thereof.