US National Security Adviser H.R. McMaster. Photo: Screenshot.

US National Security Adviser H.R. McMaster warned on Thursday of the regional threat posed by Iran.

At an event at the US Holocaust Memorial Museum in Washington, DC, marking the seventh year of the civil war in Syria, McMaster said, “Across the greater Middle East, Iran is proliferating dangerous weapons, fueling sectarian violence, and supporting terrorist proxies and militias, such as Hezbollah.”

In Syria, McMaster noted, the Tehran regime is seeking “to secure a permanent military foothold,” which would “threaten Israel, undermine US interests, and strengthen the terrorist and proxy forces that Iran uses to weaken Arab states and foment violence.”

“We cannot let this happen,” he stated. “All responsible nations must take action to counter Iran’s destabilizing activities in Syria and across the region.”

The main focus of McMaster’s speech was the ongoing bloodshed in Syria.

“All civilized nations must hold Iran and Russia accountable for their role in enabling atrocities and perpetuating human suffering in Syria,” he said.

Early in his remarks, McMaster applied the lessons of the Holocaust to the current situation in Syria.

“Remembrance is only the first step, we cannot stop at remembrance alone,” he said. “If we are to fulfill our promise, ‘Never Again,’ we must also act to protect victims and to hold all responsible parties accountable. Unfortunately, today in Syria, we are confronted once more with some of the worst atrocities known to man.”

Later, concluding his address, McMaster said, “Preventing genocide and mass atrocities falls on all of us. Every nation, and every person, must share this responsibility.”

“With allies, partners, and like-minded nations, we are acting: we are exposing atrocities, defeating ISIS, providing humanitarian assistance, deterring chemical weapons attacks, and holding [Syrian President Bashar] Assad and his sponsors accountable for his horrific crimes.”

Meanwhile, The Washington Post reported on Thursday that President Donald Trump has decided to remove McMaster from his job and was looking into potential replacements.

Watch McMaster’s speech below: