Reply #56: I would say

[The Straight Story]

That when discussing topic X there is no need to bring in Y.

In a case when one is discussing (as in the OP I posted) what someone from group X is doing there is no reason to bring in group Y.

What we have often here is if, for example I post some article about rw fundies (which I have done many times) there is no reason to talk about islamic fundies - that is a separate issue. And 99% of the time it is not mentioned.

However, bring up a topic about any other group than Christians and you can be sure that it will be brought up how Christians are just as bad.

It almost seems like the best defense people have of group X is that group Y was bad too, and since Y is bigger than X we cannot discuss that group outside of X.

Which seems pretty damned stupid to me, and hell - I am probably just as guilty. Still does not make it proper form.