The United States' laws are based on Biblical laws
Except that it isn't true.
including the First Amendment allowing us to worship freely
And how does that gel with the biblical command that you must, by your own hand, kill anyone who so much as suggests that you convert to a different religion
The fact that this was founded as a true Christian nation
If it's such a "True Christian Nation" then why is it that not one of the founders refered to it as such? Why does the constitution contain not a single reference to and deity, much less the christian "god"? Why did the very first president negotiate a treaty that specifically says "The US is not in any way founded on the christian religion", and then have that very same treaty signed by the 2nd president and ratified unanimously by the entirety senate, which at the time included more than a few of the founders?
is what makes it the best place on Earth for Jews, atheists and Muslims alike
Unlike other so-called <ahem> "True Christian Nations" of ages past where anyone not christian or not of the right christian denomination was the victim of persecution by self titled "true christians".
Face it, whethder you want to admit to it or not, there is nothing, not a single damn thing about christianity or it's holy book that so much as suggests extending tolerence or freedom of worship to any non-christian.
And all of this is why people like the ACLU are not anti-religion--they're anti-Christian
If the ACLU is so anti christian then why do practically trip over themselves to represent any and all christians whose constitutional rights have been violated? Or is it just easier for you to pretend that such a thing has never happened?
Your problem seems to be that you seem to think that instead of the ACLU that the should be something on the lines of an American Christian Supremacy Organization and that all non-christian, while being free to worship as they choose, should also be disallowed from having and voicing any opinions that you don't happen to agree with.