the aclu is not anti-anything.  it is pro-civil liberties.  instead of prematurely mourning the demise of christianity (a position that would seem to put you at odds with your claim to faith jesus will ultimately prevail), you might want to consider thanking god there's an organization willing to speak up and defend our collective right to believe what we want and to be free from the state imposing any belief structure on any of us or favoring one over another. 

there are good men and women who, like you, are absolutely sure they--and they alone--know the mind of god. they wholeheartedly believe youve been badly misled and are utterly positive you need to be shown the errors of your ways. should they be permitted to impose their beliefs on you? 

like you, they may 'know', with every cell in their bodies, it's their divinely appointed mission to bring their god's message to all.  should they be permitted to deliver that message to your kids in schools you support with your taxes? 

while it may seem to you apparent your bible is filled with proven wisdom and miracles, they feel the same way about their own holy writings.

should they be denied their triumph over your wickedness?  or you theirs?  the only fair (and fortunately legal) way to prevent either of you from forcing your beliefs on each other--or the rest of us--is to prevent the government from being involved with or acting on behalf of all ministries.

noone is free unless we are all free.