I do not think this is specificaly dedicated to christians, it is only due to the fact that the diferent categorys of christianism are the most known religions in countries where mockery of religion is not a crime.

Just take the point of view of a man that does not believe concerning, for example, some of the catholic rituals.

For example, during the mass, the believers eat a piece of bred that is supposed to be both their god's flesh an man flesh.

Litteraly speaking, this is a cannibal ritual.

So how could a person that does not believe in catholic christianism observe this without feeling horror, disgust or the wish to mock?

This is but an example without intend to harm no one, but it can make you understand the point of view of an outsider of a formally organized sect concerning this sect activities.

Globaly what you see as attacks are much more qualified as mockerys and attempts to show the absurdity of rituals and religious morals - still, from the point of view of non believers.