Vlud,
The Kalam cosmological argument is wrong....
Spot on so far...
...Just ask any antitheist...
Actually just ask anyone who understands what it entails and is capable of critical thinking. Whether or not he's an "antitheist" is entirely incidental to that, but ok....
...who wants to buck the implications of the Big Bang on materialism.
There are none that are relevant to your 'argument". Even if materialism failed in principle as well as - so far at least - in practice that would say nothing to iron-age myth as an alternative explanation.
And it is wrong it is implied because it is supported by William Lane Craig who justifies old testament masacrees or so they say. So because Graig is a wrong un' everything he believes in is tainted.
He does do that yes, but in this case he's wrong because he fails to grasp the facts and he argues his case poorly. That's all that's necessary for his wrongness.
But the Lane Craig effect in antitheism also is used in the advocacy of the rightness of philosophical naturalism.
1. There is no "Lane Craig effect".
2. There's nothing wrong with philosophical naturalism provided you stick to what it actually says and ignore your straw man version of it.
Apart from all that though...
Even by your standards this is pretty dim stuff Vlud.