My usual tactic?
"Do you believe women should be shunned to a shame hut for having a period?" "hve you ever eaten food prepared by a menstruating woman?" "do you shave?" "do you eat shellfish/pork?" "when was the last time you sacrificed a pigeon?"
I admit, i get peverse enjoyment out of quoting the various laws from leviticus at anyone who tries to use it as an excuse to be bigoted.
I mean, according to the bible, period sex is on par punishment wise as sleeping with your SISTER!
like seriously?
Also, Jesus preached love and acceptance and stated that it was only god's place to judge. Also if god didn't make mistakes why does disability exist and why is it okay to take medications for lifelong conditions, for illness, use mobility aids etc when it was apparently "gods plan" that this person couldn't walk or whatever too? Maybe it wasn't a mistake, but ultimately, mortals aren't supposed to understand the plans or thinking of gods.
Another thing I like to mention is that Pride is a deadly sin, and there's little more prideful than claiming you know god's will.
*smirk* That usually gets em pretty flustered.
Ultimately, proper christians don't need to be rebutted because they are good people. But those who need a good education well, I rather like showing that I have actually read the bible and probably have read more of it than THEY have. HAH.