Leaders shaking hands and nodding their heads is a sign of greeting among equals.
A bow of one leader to another is a symbol of subservience; the lesser acknowledging his position to the greater.
There is no way around it. As the "leader of the free world", Chairman Obama was acknowledging western subservience to Islam.

Maybe it was simply a Muslim faithful bowing to a Muslim leader, which would have been proper protocol. But when Obama bowed, he bowed for All Americans.

This is only the tip of the Obama iceberg, lying in wait for the unsuspecting American People. When you take into account his desire to take over the banks, control our food supply with the new Food Police, and now he wants to have the authority to control and if necessary SHUT DOWN the internet. And the guy hasn't even been in office a hundred days yet, What will America look like after four years? It will not be the America that any of us would recognize. This bow is the least of our problems with this guy.