Is there a contradiction between the Quran's description of the "Worshipers of the Most Gracious" as walking humbly and Umar ibn al-Khattab's fast pace, and his severity in speech and striking?

The characteristic "they walk humbly" among the attributes of the Servants of the Most Merciful means walking with tranquility, dignity, and humility, far from arrogance, conceit, affectation, or weakness. The Prophet, peace and blessings be upon him, used to walk swiftly, and some of the Salaf disliked walking with weakness or affectation. The intent is tranquility and dignity in walking, not sluggishness or feigned weakness.