Denial is an attempt to get rid of something, make it go away, place it anywhere other than here, push it outside of conscious awareness, and to disassociate from it. It’s an attempt to pretend it does not exist. This is a psychological act.
When there is denial, the "displacement" of what is being avoided appears to become separate from where it is (in you) and is sort of "pushed away" from you. Thus you push it outwards - outside of yourself.
So where there is denial, there is a pushing away, ie projection.
You can often experience this happening if you are ever around someone who represses their feelings. Regardless of how they feel, they will attempt to pretend they’re not feeling it, or they try to hide the feeling from themselves in an attempt to hide it from others. They think that if they are not aware of something, others won’t be aware of it either.
This is quite funny really and is similar to how we hide from God in order to pretend that God is not there. It’s also why we hide our secret sins and hidden hates, to KEEP them but pretend they are not there. Out of sight out of mind, but it doesn’t work.
What then happens is these people, because of denial, broadcast their stuff outward quite intensely. The more the denial, the more they project. This can especially be true of more intellectual people who do not like to feel emotions. They become loud broadcasters of what they do not want to feel. They are trying to get rid of it by projecting it away from themselves. They think that hiding it from themselves makes it go away from everyone, but it does not. Their feelings, pushed onto others, are even EASIER to see by others.
If you are sensitive or empathic you will likely easily pick up on these broadcasts and wonder why you are suddenly flooded with confusing feelings. Being around "projectors" can be quite toxic. They are emotionally irresponsible people who want to maintain a persona of everything being okay all the time, instead of being authentic. People-pleasers do this too.
This is also how we project stuff in our mind. Projection makes perception. Or you could say, denial makes projection. Upon "not wanting to see" what is being denied, it will be projected outward and then seen even more intensely. The only difference is there is a disassociation and a denial that it is inside yourself or has anything to do with you.
Always, being more responsible for everything you experience and feel will put you much more in touch with who you really are, give you strength, make you more aware and loving, and you will be much more authentic. You will also then stop sliming everyone else with your garbage disposal system.