I agree. Yet the group of people to whom I refer (a term taken from honest liberals Bill Maher and Richard Dawkins) won't do what you say.
They'll attack Christians all day long, as viciously as they can, but when the next jihadist slaughter occurs, you'll see them being very, very, VERY tolerant of Islam, AND you'll see them deflect/change the subject immediately from the jihadist slaughter directly to misdeeds of Christianity. Like clockwork, guaranteed.
It is precisely that blatant hypocrisy that I question in this particular thread, and the motivations behind it.
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I would use the term "actual" liberals to describe them, myself, as they operate according to liberal principles whereas all the apologists wouldn't know liberal political theory if it smacked them along side their idiotic little heads.
As to the inevitability of the comparisons to Christianity, it works like this:
Useful Idiot in question predetermines they absolutely must defend Islam at all costs. In order to defend and support Islam, they shift the attack to Christianty, instead, in order to distract away from Islam as well as to create intentionally false equivalences. These false equivalences offered by the Islamist defenders rely on three basic ruses.
The first of these ruses involves degree of support. If large percentages of Muslims hold certain objectionable beliefs, they compare to Christianity, even if very small percentages of Christians hold similar.
The second ruse involves heinousness of action or belief. If Muslims support killing apostates, they might point to Christians shunning them (which is also less prevalent) or if Muslims support killing gay people, they will point to Christians objecting to gay marriage.
The third ruse involves time. If Islamic actions are committed in the here and now, they point to Christian actions from the distant past, as if two world somehow existed on two completely different time frames.
Now, when people do this, they really aren't thinking up these ruses on their own, as they are too stupid for this sort of deviousness. They are simply imitating the specious arguments of the other sheep they see doing the same thing. It doesn't make any difference how their idiotic comparisons fail on any conceivable level, as the fact they are all making them creates the impression they are actually valid.
It is so utterly predictable and vapid, and has become a regular part of the arsenal of these profoundly illiberal morons.