"It is indispensable to be vigilant against all displays of anti-Americanism, which would be unacceptable," spokesman Jean-Francois Cope quoted Mr Raffarin as telling parliamentary leaders at a meeting on Tuesday.
The government should also be on guard for any signs of racism, anti-Semitism or xenophobia in the frequent protests against the war, Mr Cope quoted him as saying.
"This violation of a burial place - scandalous in itself - is an attack on the memory of the sacrifice made by the British and American soldiers who contributed to the liberation of our soil," said the local member of parliament, former Socialist arts minister Jack Lang.
"Our disagreement with the British and American governments (on Iraq) can in no way justify any assault on the memory of men who sacrificed themselves for our country."
Mr Raffarin's warning was the latest in a series of comments apparently aimed at healing the deep rift with the US and UK which opened up over the Iraq crisis.
Mr Raffarin has already said that France is not an enemy of the United States, while the Foreign Ministry has issued a statement saying Paris hoped US-led forces would win the war in Iraq.