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I don't really know much about religion ....
Both Christians and muslims have some sensible core tenets....
But really killing people is not the answer.
I've taken the liberty of summarizing your comments. Look at the logical puzzle you have presented.
The solution to it is to reverse the bolded statement.
No, they do not have the same sensible core tenets.
If they did, Muslim leaders would widely and openly condemn such brutality and senseless killings as what has recently happened in France.
But they don't.
Did the France president condom the acts of a teacher who was making fun of the religion ? Rather he himself encouraged this act and enforced a shameful decision of publishing the cartoons on the walls of building in france.
So why would you expect Muslim leaders should condemn the killings which are happening only in the reaction ?