I wouldn't necessarily be opposed. But there is a difference between responding to a direct attack on our own people and intervening in another country's internal conflict.

And whatever I think, at this political juncture military intervention to promote democracy in a Muslim country is likely a hard sell politically. Considering the continuing controversy over our actions wrt a regime that violated most of its peace terms from the previous war, will the public support attacking one that-- however murderous at home-- has been sort of behaving itself internationally in recent years, and with which we don't have a direct casus belli?

(We did, at length, intervene in ex-Yugoslavia, but only after it had ground on a long while, and there was no Iraq or Afghanistan fatigue then.)