A new remake of the 1984 cult slasher about a child who is traumatized after seeing his parents killed by a man dressed as Santa Claus, and who, years later, dons a Santa suit himself and embarks on a murderous holiday rampage.
No injection on screen but near the end there's a scene where a desk is covered in syringes, with the implication being they've been used to sedate abducted people
One scene involving a man running his hands all over a young woman while saying, "If I were 35 years younger..." But no age imbalance in actual relationships
Main character's parent is killed by a rifle at the start of the movie in many flashbacks. Guns are used quite a lot throughout with a fair bit of gore.
Not exactly - a character is shown to have inherited someone else's personality and takes direction from it, so it's hard to say if this would be adjacent to a DID plot
At 1:14:00 there's a graphic scene of someone's head being caved in with a hammer. There's an earlier less graphic scene of a victim sitting in a chair who's been killed by an axe to the skull.
There's a scene of a man killing a woman with a knife, and it looks like the knife might go through her hand and into her eye, but we don't actually see it or any aftermath, so I'd say no.
He uses a straight razor to shave his face, not exactly a razor but he also uses a box cutter several times (mostly for boxes, but for stabbing in one scene)
During the hockey rink scene (around 31 minutes in), a little boy is being harassed by bullies and tells his aunt they said "only f--s wear figure skates"