NYT: describing demonstrations

"From Lebanon to Iran, Israel's adversaries used the weekend assault to marshal crowds into the streets for noisy demonstrations." First note that Israel's adversaries (as if the people themselves are not Israel's adversaries) conspiratorially "marshaled" the crowds. Secondly, notice that the demonstrations are "noisy." Can you imagine demonstrations for Israel are described as "noisy"? What makes a demonstration noisy? (thanks Sarah)