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Incitement???Maybe. Definitely a violation of
18 U.S. Code § 700 - Desecration of the flag of the United States; penalties
(a) read as follows: “Whoever knowingly casts contempt upon any flag of the United States by publicly mutilating, defacing, defiling, burning, or trampling upon it shall be fined not more than $1,000 or imprisoned for not more than one year, or both.”

b) read as follows: “The term ‘flag of the United States’ as used in this section, shall include any flag, standard colors, ensign, or any picture or representation of either, or of any part or parts of either, made of any substance or represented on any substance, of any size evidently purporting to be either of said flag, standard, color, or ensign of the United States of America, or a picture or a representation of either, upon which shall be shown the colors, the stars and the stripes, in any number of either thereof, or of any part or parts of either, by which the average person seeing the same without deliberation may believe the same to represent the flag, standards, colors, or ensign of the United States of America.”