The comments come as an Islamist opposition group with ties to the al-Qaida terrorist organization continues moving across Syria, intent on toppling the regime of Syrian President Bashar al-Assad.

The group Hayyaat Tahrir Al-Sham or HTS, launched its campaign at the end of November. The United States, European Union and other countries classify HTS as a designated terrorist group.

On Friday, HTS members moved within striking distance of the city of Homs in Western Syria, causing civilians to flee ahead of their advances. Homs is located approximately 100 miles north of the Syrian capital Damascus.

“Opposition fighters in Syria, in an unprecedented move, have totally taken over numerous cities, in a highly coordinated offensive, and are now on the outskirts of Damascus, obviously preparing to make a very big move toward taking out Assad,” Trump wrote Saturday.

“This is where former President Obama refused to honor his commitment of protecting the RED LINE IN THE SAND, and all hell broke out, with Russia stepping in. But now they are, like possibly Assad himself, being forced out, and it may actually be the best thing that can happen to them.”

Syria and its president for the last 24 years, al-Assad, have alliances with Iran and Russia, with the latter previously supporting Syria’s efforts to suppress opposition.

Trump made a point on Saturday to mention Russia.

“Russia, because they are so tied up in Ukraine, and with the loss there of over 600,000 soldiers, seems incapable of stopping this literal march through Syria, a country they have protected for years,” he wrote.

The president-elect is in Paris where he his attending the official reopening of the Notre Dame Cathedral, along with other heads of state like Britain’s Prince William.