Why Salute with Left Hand?

Saluting with the left or right hand has nothing to do with being disrespectful. The salute, in and of itself, no matter which hand is used, is respectful. The US military uses the right hand for a reason and that reason is utilitarian, not an issue of respect.

Is saluting with left hand disrespectful?

In the Army and Air Force, the salute is given with the right hand palm facing forward and fingers slightly touching the right side of the forehead, but not on the forehead. ... The salute is never performed by the left hand even if the right hand is occupied.

Why does military salute with right hand?

Some historians believe it began in late Roman times when assassinations were common. A citizen who wanted to see a public official had to approach with his right hand raised to show that he did not hold a weapon. Knights in armor raised visors with the right hand when meeting a comrade.