1488 is a combination of two popular white supremacist numeric symbols. The first symbol is 14, which is shorthand for the "14 Words" slogan: "We must secure the existence of our people and a future for white children." The second is 88, which stands for "Heil Hitler" (H being the 8th letter of the alphabet). Together, the numbers form a general endorsement of white supremacy and its beliefs.
The "14 Words" slogan was attributed to David Eden Lane, a cofounder of a now-defunct white supremacist organization called The Order. https://www.snopes.com/fact-check/mike- ... llow-1488/
Screw the ADL, Mr. Lindell! Offer your pillows for any price you want.