Two New York politicians came out yesterday with plans to beef up security here. Secretary Cuomo, who is running for governor, wants to call up the National Guard to stand outside synagogues and Jewish community centers, which he said deserve the level of protection now afforded to airports. Rep. Joseph Crowley, who represents Queens in the House of Representatives, is proffering a plan to spend $5 billion for additional security here, including hiring 1,500 more police officers and placing “sensors to detect chemical and biological agents in critical subway stations.”To think about these measures is to be reminded of the great truism about the best defense being a good offense. By the time that “sensors” detect a chemical attack in the subways, it would likely be too late to do much about it. The notion that fuel tank trucks aimed at Jewish targets in New York are going to be stopped by National Guardsmen is chimerical, though we’re all for the guard. The real test of Messrs. Cuomo and Crowley will be whether they line up in support of offensive measures, whether they will desist from politics and support a war to bring the battle quickly and decisively to enemy soil. Are they prepared to make Saudi Arabia, Iraq, Iran, Syria, and the Palestinian Arab authority — among other terrorist spawning grounds — the ones worried about attacks, not civilians here in New York? Will they line up behind the president on his new doctrine of pre-emption?