It comes after Congressional Republicans and right-wing voices online drummed up fears over the decade-long $80 billion cash infusion the agency was allocated as part of the Inflation Reduction Act, which President Joe Biden signed into law last week.
"We see what's out there in terms of social media. Our workforce is concerned about their safety," Rettig explained to The Washington Post Tuesday. "The comments being made are extremely disrespectful to the agency, to the employees and to the country."
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Rettig, who was appointed by former President Donald Trump, had sent out a letter to workers, which was obtained by The Post, telling them that the IRS would be undertaking a risk assessment for each of the IRS's 600 faciliies - the first of its kind since the Oklahoma City federal building bombing in 1995.
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"For me this is personal," Rettig announced. "I'll continue to make every effort to dispel any lingering misperceptions about our work. And I will continue to advocate for your safety in every venue where I have an audience. You go above and beyond every single day, and I am honored to work with each of you."
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Republicans and their right-wing allies have turned IRS employees into political punching bags in the run-up and the aftermath of the $370 billion bill's passage.
"Abolish the IRS," Republican Sen. Ted Cruz tweeted Sunday.
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Earlier in the month, Cruz argued that "Schumer-Manchin would fund 87,000 IRS agents."
"Just imagine THOUSANDS of IRS agents descending upon America like a swarm of locusts!" he tweeted.
Republican Sen. Chuck Grassley asked on Fox: "Are they going to have a strike force that goes in with AK-15s already loaded ready to shoot some small business person in Iowa?"
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On the House floor arguing against passage of the Inflation Reduction Act, Rep. Lauren Boebert - usually a Second Amendment enthusiast - also brought up agents being armed.
"This bill hires 87,000 new IRS agents and they are armed and the job description tells them that they need to be required to carry a firearm and expected to use deadly force if necessary," she announced.
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"Excessive taxation is theft," she continued.
The chair of the National Republican Senatorial Committee, Sen. Rick Scott, wrote an open letter to job seekers last week pressing them not to apply for positions at the IRS.
New hires, Scott claimed, would "need to be ready to audit and investigate your fellow hard working Americans, your neighbors and friends, you need to be ready and, to use the IRS's words, to kill them," he announced.
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