Marx and Obama liken all capitalists, domestic and foreign, to warring brothers. One state may posses the power to impose some kind of peace based on its own ability to impose that peace.because of a superior force. Marxists look to a world without war, yet no Marxist can condemn all wars. Wars that are fought to advance the capitalist or imperialist are the wars that should not be fought. The United States fighting a war to impose its will on a revolutionary force is a war that should not be supported or fought. An oppressed people fighting a war to free itself from the oppression of an evil imperialist should be supported. To enable the people of Egypt or Libya to free themselves from the oppressors was valid and warranted.
The ideal as put forth by Marx and Obama is to live in a world of abundance in which there is no longer any justification for war. Given the social order as outlined by Marx and being advanced by Obama, that is one based on planned production and distribution for human need, they believe it would be possible to provide everyone with a healthy existence without recourse of exploitation of one by another, or of warfare.
When these revolutionist like ISIS say they wish to change the United States and the West, remember it is the core belief of Obama to also fundamentally transform or change the United States. This was his promise. He is against war in general and is certainly against fighting people who have the same goal he has. He will not allow the military to fight a war to win the war, but will limit the military to only doing what must be done politically with the least amount of damage or harm done to the revolutionaries. Remember, he along with all American Marxist/Progressives believes the United States is a bigger threat to world peace that is ISIS and that climate change is the single most serious threat facing civilized mankind today.
What Obama is doing in conducting this war is very consistent with his core beliefs.