Alex Boone is not a fan of the National Anthem protest of Colin Kaepernick.

Kaepernick has not stood at attention once during singing of the National Anthem in the three San Francisco 49ers preseason games.

According to Kaepernick,  it is a protest of the oppression of people of color in the U.S.

Boone, who is now a Guard for the Minnesota Vikings, played five seasons alongside Kaepernick with the 49ers.

“We probably would have had a problem on the sideline”, remarked Boone in reference to when he played with Kaepernick. “[It was] shameful.”

“You should have some f—ing respect for people who served, especially people that lost their life to protect our freedom,” said Boone, who has a brother that served with the U.S. military. “We’re out here playing a game, making millions of dollars. People are losing their life, and you don’t have the common courtesy to do that. That just drove me nuts.”

“You still have to respect [the opinion of Kaepernick] even if you don’t agree with what someone does,” reasoned Anquan Boldin, a former 49ers receiver and team leader.

“Anquan said it this morning [that Kaepernick had the right to do it], and I was kind of mad that he said it, because I was like, ‘God, if Anquan says it, I’ve got to go with it,’ because Anquan was such a leader, and he’s a smart guy, responded Boone. “[Anquan] gets it. But at the same time, I was upset with his choice to do that and kind of disrespect the flag.”