I wouldn't debate with someone who assigns a "probability of 0" to anything (especially as in "actual 0"), other than to link to any introduction to Bayesian probability. But your time is of course your own :-), and I'm biting the lure too often, myself.

people claiming that souls exist are probably minor evidence against their existence

Well, it points to the belief as being one which constantly needs to be reaffirmed, so it at least hints at some controversy regarding the belief (alternative: It could be in-group identity affirming). Whether you regard that as evidence in favor (evolution) or against (resurrection) the belief depends on how cynical you are about human group beliefs in general.