Revenge for all that summoning

Isn’t there a manga that shows the perspective of  how some worlds hide it via truck kun 

It goes both ways.

When people summon "demons", it might just be what you're talking about. "They are inherently evil" and any kind story like that is only the point of view of the summoners, who have the tendency to make stuff up and rewrite history as they see fit like the greedy liars they are.

Even if they're "actually evil", it might just be that the other world arranged it such that the only target of the summonings ends up being only those (maybe-artificial) "evil" beings as some sort of revenge.

Humankind should just nuke itself. 

There was something more or less like that in 'Gate – Jietai Kare no Chi nite, Kaku Tatakeri' 

There's a novel about truck-kun too: There Are Too Many Truck Reincarnations! 

Ahhh, your talking about reincarnations into a new world.   I’m talking about summoning so... people are walking and they disappear... mass missing people... no dead bodies.

Within so many summoning stories, you see them disappearing, even in front of people and definitely in front of cameras. 

Well at least with the fae folk, they leave a construct behind to live your life. 

While sufficiently advanced tech may look like magic for those that don't understand that tech, there is still a clear difference between what is magic and what is tech for those in the know... I think the easiest example to use in that regard is Toaru Majutsu. Both Esper powers and Magic are magicky, but they're clearly different at their core.

And I like magic more than tech, so if I was author-sama, I'd make the mages better~