I'd agree with Beoman there, particularly since you've gone through the A&P and will have no doubt started crossing Dark Night shortly afterwards so if you haven't been actively practicing vipassana then you'll possibly have meandered through this stage at a slower pace.
If you're getting Kundalini effects then you're almost certainly going through A&P during your sitting so the progression from there to Dark Night and onto Re-observation is perfectly natural. This would explain that sense of fear which is a characteristic of this part of the process and the only way to deal with it is to treat it like everything else which arises and passes. Note it, examine the Three Characteristics and move on.
Your old reality tunnel is causing that dualistic Christian hangover, surrendering to what's happening during the Dark Night is the way forwards. You can't "fight" this stage, it happens whether you want it or not so acceptance and awareness of what's going on during your practice i.e. noting is essential and will carry you through to Equanimity. It's not always easy but stick with practice as this
will help you.
As for the malevolent presence, note this feeling and what's involved in it. See it for what it is, just a bunch of vibrations and sensations but don't try to intepret it while you're noting it. The thought that this "presence" is either God/Devil/Good/Evil is illusory and implies a duality which, once you've seen through these sensations, doesn't even exist! You can prove this for yourself and you'll see in real-time how we project these ideas and give them validity by mistaking them for being objective, seperate things.
The best advice I've ever seen with regards to vipassana practice is this: Did you note it?
Note, note, note and note at whichever pace suits your and you will absolutely pass through these stages. There's a lot to be learned during this phase so be mindful and don't beat yourself up if you don't make instant progress, accept what arises and realise that it passes just as quickly.
Good luck with your practice, hopefully this helps a little and welcome to the DhO! There are people on here far more qualified to offer advice than I am so if what I've said is a load of shite then there'll be someone else who can help....

Tommy