Why does Vim highlight all my JSON comments in red?

Question

I've got some comments in a JSON file that were autogenerated by, and unfortunately it seems like vim can't recognize that they're just comments.

They're all red - which one of my plugins is doing this?

I don't really want to turn all of my syntax highlighting off, and I also don't want to clear the errors manually each time I run into the red highlighting.

" Enable syntax highlighting
syntax enable

" PLUGINS
call plug#begin('~/.vim/plugged')

"   deoplete - code completion
if has('nvim')
"      Add in a syntax file for deoplete typescripe, then add deoplete
    Plug 'HerringtonDarkholme/yats.vim'
    Plug 'mhartington/nvim-typescript', {'do': './install.sh'}
    Plug 'Shougo/deoplete.nvim', { 'do': ':UpdateRemotePlugins' }
else
    Plug 'Shougo/deoplete.nvim'
    Plug 'roxma/nvim-yarp'
    Plug 'roxma/vim-hug-neovim-rpc'
    Plug 'ternjs/tern_for_vim', { 'do': 'npm install' }
endif

"   fzf - fuzzy find
Plug 'junegunn/fzf', { 'dir': '~/.vim/installed/fzf' }

"   lightline - a nice looking bottom bar
Plug 'itchyny/lightline.vim'
"       also get rid of the useless -- INSERT -- since we have a nice bar
set noshowmode

"   nerdtree - a little tree file browser 
Plug 'scrooloose/nerdtree', { 'on': 'NERDTreeToggle' }
"       map it to control-O
map <C-o> :NERDTreeToggle<CR>

"   gitgutter - adds some git context to the left side bar
Plug 'airblade/vim-gitgutter'
set updatetime=100

"   ale - asynchronous linting engine, highlights stuff
Plug 'w0rp/ale'

"   deoplete-ternjs - adds javascript to deoplete
Plug 'carlitux/deoplete-ternjs'
"   tern_for_vim - adds in the tern 'engine' or whatever to vim
Plug 'ternjs/tern_for_vim', { 'do': 'npm install && npm install -g tern' }

"   vimproc - async execution for things
Plug 'Shougo/vimproc.vim', { 'do': 'make' }
"   tsuquyomi - unpronouncable client for TSServer for completion and more
Plug 'Quramy/tsuquyomi', { 'do': 'npm install -g typescript' }

call plug#end()

" CONFIGURE - some of our plugins need configurations so add that in

let g:deoplete#enable_at_startup = 1
let g:deoplete#enable_ignore_case = 1
let g:deoplete#enable_smart_case = 1
let g:deoplete#enable_camel_case = 1
let g:deoplete#enable_refresh_always = 1
let g:deoplete#max_abbr_width = 0
let g:deoplete#max_menu_width = 0
let g:deoplete#omni#input_patterns = get(g:,'deoplete#omni#input_patterns',{})

let g:tern_request_timeout = 1
let g:tern_request_timeout = 6000
let g:tern#command = ["tern"]
let g:tern#arguments = ["--persistent"]
let g:deoplete#sources#tss#javascript_support = 1
let g:tsuquyomi_javascript_support = 1
let g:tsuquyomi_auto_open = 1
let g:tsuquyomi_disable_quickfix = 1

Answer 1

As @Michail mentioned, JSON syntax does not support comments, so Vim marks them as error.