A frowning old man in a military cap and a civilian suit stands amongst a crowd of people outdoors carrying signs and balloons.
An angry military veteran watches as people protest the war.
The first sentence makes it seem like they could be taking part in the protest or just caught in the crowd, unable to move away. One would not assume that the old man watches the protesters.
You can frown and not be angry. Just because people are carrying signs and balloons does not mean they protest the war.
Not all frowning man in a military cap and a civilian suit carrying signs and balloons protest the war.