I genuinely believe the reasons for all that you rightly observe is because the truth of God, the Bible, and the Covenant, are anathema to such ones as that.
They come for you, for me, for others in Christ because they are enemies of the truth. The hounds of Hell travel in packs.
It would explain the limited rhetoric, the condemnation of God's will, word, law, covenant, using the disguise of false doctrine, so that it appears they're not purposefully intending to disrespect the faith but rather are just misled and can be put right with gentle correction.
But that's not true. I checked. This pack, some, have been on the anti-gospel track for years. The same rut. The same rediculous false rhetoric.
They clearly dislike you with a passion. They gang up in your threads and assail you over and over.
It's a test.
Remember Satan in the Desert? He tested Jesus during his fast, over and over. Just once he wanted Jesus to concede to Satans perspective and leading.
Truth doesn't concede to the lie.
They want to assail every thread you make, every thread any Christian makes, when seeking to discuss Apologetics, Soteriology, etc.... So to bring chaos and discord into the thread and discourage new members in particular from participating due to the conflict and hate filled atmosphere they purposefully conjure.
Imagine.
Imagine if we turned them off. Removed them from having any chance again of gaining our attention.
Oh, they'd still labor to deceive. They'd escalate their fallen behaviors because their tired false rhetoric was no longer getting our attention.
Then for those that still read them, would witness how dark they are.
Imagine Christian communication without the destraction of demons opposed to the light.
We can't counter their lies with truth. You know this has been tried for overlong and has failed to alter their behaviors. In fact continuing to try to reach them just encourages them to continue.
It's like thinking if we just pray hard enough one day Satan will repent, and ask to be Baptized.
Ain't happening, ever.
They gain pleasure thinking they're hurting our feelings. The truth from God in Christ is to recognize dedicated depravity and accept they aren't good people.
If you keep trying to reach them, they'll only feel encouraged to keep going because they think Christians holding faith are pathetic.
And when we're public about our faith, as in gathering in forums and discussing the Bible publicly, we invite attack,contempt,mockery, personal insults, upon ourselves.
And they like to see how low they can go and how long we'll remain responding with a Christ like demeanor.
Because as soon as we reply in language they understand they'll feel satisfied their tactics have worked, and we're deluding ourselves.