Food that is high in protein and is not solid for people with wisdom teeth removed?
Your common 'non-solid' high-protein items are:


peanut butter, or other nut butters
eggs
yogurt
cheese (cream cheese or served melted)
tofu


Depending on how strict you're being with the fat intake, you can go even further ... low fat or non-fat yogurts and cheese (eg. neufchâtel instead of cream cheese); whites only for the eggs, etc.  Be warned that if you try to go too low-fat during this time, your body might actually crave more feed, making the problem worse.  If it's not a problem with your body being unable to process fats, you might want to reduce protein but increase fats during this time.

The good news is that unless you're a body builder, having a lower protein diet for a week or two  while things heal won't cause your body to start eating itself -- in fact, most American diets have more protein in it than our bodies need -- about 3-5oz of meat per day (not per meal) is enough; exact amount depends on your size and build.

As you can get away with soft foods, and not just non-solid:


Scrambled eggs (leave out a few yolks if you're really sensitive to the fat).
Pulled pork, roja vieja, pot roast cooked 'ragout', or similar (you might need to also chop it up if the bits of meat are long).
Pasta with an egg sauce (like carbonara, but might have to avoid the black pepper and/or crispy meat ... might be able to use a soft ham and/or add extra salt or worcestershire) or a cheese sauce (eg, macaroni and cheese, alfredo)
Tuna fish (canned in water; can either make into a tuna salad (avoid celery.  Use a grater to extract onion juice for flavor without solid bits of onion.  Pickle brine can help brighten it up while being non-solid)
Refried beans (make your own, and you can cut down the fat significantly)
Many soups.  (either make a strong stock, cook the meat 'til it's soft, or put it through a blender ... or egg drop soup)
Cheesecake (use neufchâtel cheese, or find a recipe that uses soft tofu)
Flan, custards, or ice cream (made with a custard base, but low-fat milk)


You can also work some extra protein into other dishes ... thin your mashed potatoes with (pre-heated) stock a bit more than you typically would, then while still hot, blend in a egg or two.  Or add neufchâtel cheese instead of milk or butter (add stock if you still need to thin it further for your tastes)