The problem isn’t too few forces.
The problem is the premise that imperialists can re-colonize a country under the pretense of counter-terrorism, counter-insurgency or liberation in the face of mass resistance.
At present Europe is dependent on the supply of gas via Russia from the Caspian Sea, principally from Turkmenistan. This gives Moscow enormous political leverage when it comes to such matters as NATO’s decision to admit Georgia or Ukraine. U.S. policy has been to build pipelines from the Caspian avoiding Russia or Iran. Construction of the TAPI (Turkmenistan-Afghanistan-Pakistan-India) pipeline which will pump the gas straight to the Indian Ocean and on to world markets has been long delayed due to the fighting in Afghanistan.
The pipeline will run through Helmand province, then into Pakistan’s Balochistan. If it all works out, this will represent a highly significant improvement in the geostrategic position of the U.S. in the region, including in the event of another world war (such as might be provoked by a U.S. attack on Iran’s nuclear facilities and unpredictable repercussions of such action).
We should respond: No it’s not necessary! in the streets that day and those following---until we force Obama to end what are now unmistakably his criminal imperialist wars.