San Francisco 49ers fans are fuming mad with quarterback Colin Kaepernick’s racial protest of the national anthem — so they’re setting fire to his jersey.

Thousands of 49ers fanatics incinerated Kaepernick on Twitter with some even lighting up his number 7 jersey following his decision to sit down during the national anthem at Friday night’s preseason game.

“Welp when you don’t rise for the flag to show your respect for the men and women who fought and continue to fight for our freedom you start #losing #fans and well here is a video of my father in law#burning his #kaepernick #Jersey and now he is gonna need a new #49ers Jersey,” one angry fan wrote on Instagram with a video of the

emblazoned jersey.

Another 49ers supporter, wearing former linebacker Patrick Willis’ jersey, uploaded a video of himself torching Kaepernick’s jersey and standing at attention while the national anthem played in the background.

Others demanded that Kaepernick get booted from the team for his unpatriotic protest.

“People die every single day defending that flag you refuse to stand for and I won’t stand for that,” @nate3914 said in an Instagram video before dousing the jersey in lighter fluid and watching it burn. “This jersey was the worst $50 investment I have ever had … you should never play in the NFL again, move to Canada.”

Kaepernick, an avid supporter of the Black Lives Matter movement, refused to stand during Friday’s game game against the Packers.

“I am not going to stand up to show pride in a flag or for a country that oppresses black people and people of color,” he said in a post-game interview with the NFL. “To me, this is bigger than football and it would be selfish on my part to look the other way.”

This is not the first time the 28-year-old player has skipped out on standing during the national anthem, a gesture that is “encouraged but not required,” according to NFL spokesman Brian McCarthy.

He did it twice last year during preseason games that he wasn’t in uniform.

And the 49ers are sticking by their quarterback, releasing a statement supporting Kaepernick.

“The national anthem is and always will be a special part of the pre-game ceremony. It is an opportunity to honor our country and reflect on the great liberties we are afforded as its citizens,” the team said.

“In respecting such American principles as freedom of religion and freedom of expression, we recognize the right of an individual to choose and participate, or not, in our celebration of the national anthem.”