WHDH reports on the It’s Okay to Be White sign that hung over the Mass Pike eastbound at Lewis Terrace in Newton Friday morning.

For anyone who is questioning the sign maker’s intentions, here’s some context from the Anti-Defimation League:

The phrase “It’s Okay To Be White” is a slogan popularized in late 2017 as a trolling campaign by members of the controversial discussion forum 4chan. The original idea behind the campaign was to choose an ostensibly innocuous and inoffensive slogan, put that slogan on fliers bereft of any other words or imagery, then place the fliers in public locations. Originators assumed that “liberals” would react negatively to such fliers and condemn them or take them down, thus “proving” that liberals did not even think it was “okay” to be white. Whether the original trollers were white supremacist or not, actual white supremacists quickly began to promote the campaign—often adding Internet links to white supremacist websites to the fliers or combining the phrase with white supremacist language or imagery. This was not a surprise, as white supremacists had themselves used the phrase in the past—including on fliers—long before the 4chan campaign originated. The original flier campaign occurred in late October 2017 and a similar campaign took place at the same time in 2018, but use of the phrase has extended far beyond the flier campaigns.

More from Wikipedia here. Or just Google the phrase and you will find many other news reports. This is not just an isolated thing some teenager just invented.