Although this was true, at the time, and the Mongols did practice religious tolerance, they later supported massacre of Jews and Christians.

Resident of Balkh Bukhara in 1220: "Our town had not recovered and it’s mosques, colleges, and bazaars are in ruins."

As a Resident of Balkh Bukhara in 1220, you can see the mongols “ferocity and destructiveness” just by looking at the archaeology of great cities they’ve ruined.

Resident of Balkh Bukhara in 1220: When the Mongols invaded, they had not only looted and slaughtered people but but most of their cities burned.

They practiced religious tolerance among the Empire. Warriors were treated well, promoted wealth based on Merit, established a vast postal system, and enforced Universal rule of law.

Women in the Mongol Empire had rights. They controlled domestic affairs, could get a divorce, and were trusted advisors.

The mongols were able to build a system of roads and continued to maintain and guard their trade routes.

They only gave two options for people; to either surrender or die. Because of this, they wiped out 2/3 of China (10% of the world's population)

The mongols didn't leave behind any architecture, language, or culture.

The Mongols spread disease (most likely responsible for the Black Death), and sometimes on purpose.