It's quite simple, if someone is, in reply to another, unwilling to be responsive to your message and resorts to the illogical, emotional, or the confrontational at length while avoiding substance, why should they be indulged? Obviously they shouldn't be.
Most of us can find that kind of contact over our backyard fence and is why we search the intenet for something better. Allowing open discussion and permitting another soapbox to the redundancy of systemic incredulity are entirely two different things and we will not put up with the latter.
If you will search the net you will find I do not shirk from honest skepticism and its arguments. And never will.