There is, of course, a good likelihood that what we are dealing with here are the "forces of darkness."
But if that is the case (that we are dealing with the forces of darkness), the following questions arise:
Actually, the Renaissance was the beginning of the interaction of Forces of Darkness with Christians. And this makes sense in light of the fact that it was then that the Mysteries, mystical pantheism, reincarnation, evolution, karma, Hermeticism, and other ancient doctrines of demons had entered into the heart of Christendom and precipitated the falling away of Christians at the top of society and church.
. Is it because our technology has increased to such a degree that our world is intersecting with theirs and our sensors are so advanced (on aircraft for example) that we can now see what has been there all along?
No. Very simply, Dark Forces (in this case fallen angels) are up in the heavens above (1st heaven, not 2nd heaven) and can allow themselves to be seen or not. It's up to them, not man
Are we just in the End Times and evil is making its move?
Not the very end but the end of post-Christian W. Europe, NZ, Australia, Canada, USA
Has our Godlessness invited evil into our world by opening a portal through which evil has merely walked right in?
It is more correct to say that when ministers of the Lord cease being His ministers their apostasy opens the Abyss and allows what is there to enter into the world of mankind. And from the Renaissance on through to our own time very many ministers have fallen and continue falling away, so we should expect Dark Forces to be here in a very active way. For instance, in Hendrik Berkhof's very influential book, "Christ and the Powers", he writes that fallen Powers were the drivers behind Hitler's Third Reich. They were also the facilitators of Marxist Communism. And they will also be the drivers behind the current Great Reset and NWO. It is not without reason that a UFO was spotted above an outdoor Philadelphia stadium where Obama was celebrating his Presidential win.