If you downloaded it already you can still go to stuff like the Steam Discussion page (though I don't recommend it, every single post not by the developer seems to be either antisemetic or islamophobic). Here's the post from the creator about the delisting:

Hello friends,

The zionists could not ban my game because it's political content, but they found a mistake of mine, and sent a DMCA take down notice to valve. The problem is that image of Telaviv City on the Iron Dome Panel Screen. I did not know that image was copyrighted, so the Israeli company who made that image sent this DMCA take down to Valve, and it is a standard to take the game down until things are fixed up. But it is just temporarly, I am already fixing it up. and re-checking all assets to see if there is any other copyrighted material. Be sure it will come back online, very soon, Insha Allah, and with many improvements, like the ability to cancel the Bullet Time effect, an updated Training Mission, and now the Knife Kills work like a charm. So the bad is for good :steamhappy: