Why does the US make Assad out to be desert Hitler? He wants to keep his nation together and out of the hands of rebel groups and ISIS. He's the one that we should be supporting, not name calling.
The Americans are not much interested in Syria. But their allies (especially Israel, Turkey and Saudi Arabia) want Assad out of power. The Israelis want Assad out, because he is sympathetic to the Hezbollah. The Saudis don't like him because he is secular, and is against the Wahabbist / Salafist ideology. Turkey's issue is that Assad is not banning the Kurdish language and customs in Syria.