There are still some politicians who haven’t forgotten the lessons of September 11: Republicans slam Islamic Society convention.

They happen to be Republicans, but if there were Democrats among them, their names would also be highlighted here.

Republican lawmakers are urging the Justice Department not to participate in a convention held by the Islamic Society of North America — a group named as an unindicted co-conspirator in an ongoing terrorism-financing case.

In a letter to Attorney General Alberto R. Gonzales, Reps. Peter Hoekstra of Michigan, ranking member of the House Permanent Select Committee on Intelligence, and Sue Myrick of North Carolina called the Justice Department’s involvement a “grave mistake.”

“In light of the threat that our nation is currently facing from radical jihadists, and because of the president’s commitment to fighting the war on terror on all fronts, we believe it is a grave mistake to provide legitimacy to an organization with extremist origins, leadership and a radical agenda,” the lawmakers said.

Rep. Peter T. King, New York Republican and ranking member of the House Homeland Security Committee, said he agrees that Justice officials should not attend the conference.

“It is absolute insanity for the federal government, especially the Department of Justice, to be giving any credibility at all to a group like the ISNA, which has such strong links to Islamic extremism,” Mr. King said.