Extraterrestrials will attempt to destroy our civilisation for our planet and its resources

Firstly I"d like to state why I believe the Fermi paradox is invalid. The Fermi paradox states that the Galaxy should be teeming with extra-terrestrial civilisations even with modest habitable planet figures. This is then seen to be paradoxical with respect to the fact that we haven"t observed anything to suggest that there are in fact any sapient races. However there is a fault in the conclusion drawn from this lack of evidence. We, as a species have only been "online" as a civilisation for 60 years or so as this is how long we have been broadcasting radio signals into space (for communications, military radar etc..). Again this is a miniscule period of time compared to cosmological time. Another fact is that space is truly vast. Much too vast for any human to truly comprehend. We are talking distances of tens of trillions to just the very nearest stars (our "stellar neighbours") and many, many times further for many stars you see in the night sky. This, combined with the fact that light travels at a finite speed means that we have a bubble around us representing how far out our communications have reached into space. It is 50 or so light years and even then most of our radio communications are much too weak to actually be extracted from background noise at that distance. So the fact is that only a handful of stars could actually pick up our signals (via military radar or other strong signals etc..) if they happen to be listening to the right part of the sky at the right time. Not to mention it would take 50 years for them to send a message back if they replied today. So my point is that we are very isolated in space. And the same for the inverted scenario. We are extremely unlikely to pick up any signals even if the galaxy is crowded with sentient life. The fact that we haven"t any evidence from the last 50 years is not reason to jump to conclusions as it is a cosmic "blink" of time. We also have no reason to assume anything about the population of the Galaxy. It could be extremely populated, sparsely populated, only a handful or even just us! Now for this debate we have to assume that there are at least a few but we can"t assume that it is heavily populated as there are far too many unknowns. Therefore it is wrong to assume we should have been visited. As we only have a sample of one, we can"t say anything about the likelihoods of us being visited are. I would also like to add that if they are interested in our species why would that rule out the possibility of hostility? Maybe they are interested in the same way a country is "interested" in a rival nation and so they send spy planes/satellites above it to monitor them. If there are any aliens observing us, our first reaction should be that of suspicion and defending ourselves. Maybe they are carrying out reconnaissance to aid the battalion of ships they are sending towards us to exterminate our species. Well I use the world colonise in a broad sense. It doesn"t have to mean settling there. It just means that they use the planet in some way. I don"t see the motive of any E.T just destroying our planet without taking advantage of the resources they"ll need for building ships and such. A much more efficient plan would be for the E.T civilisation to kill the native civilisation without destroying the planet which would surely require unbelievable amounts of energy to do anyway. Then they can send ships afterwards to use the planet for its resources. A non destructive method like a computer virus or nanobots would be many orders of magnitude easier and more beneficial. I believe as the technology of the civilisation increases and the resources of their native solar system runs out over millions of years, it will become fruitful for the civilisation to colonise other worlds. Interstellar travel while far out of our reach at present, could be trivial for a civilisation a million years older than us. I put forward that E.T would be forced to look for other planets to grow. This is theoretically possible but what if they seeded life here on earth just to have an ecosystem here for whatever reason and they had no knowledge of any of a sapient race evolving here? They could have planted life here just to create a habitable environment for them later down the line. Then it is likely they will not want us to inhabit and mine the planet for ourselves and will therefore want to remove us. I don"t know of any evidence of this grand claim. It is a purely hypothetical theory that has no pieces of evidence behind it. In this case there could be two types of E.T. Ones that cohabit the universe with us and ones that are our creators and being that cohabit their "universe". If this is the case then my points all still stand. They could well also remove us from the simulation in favour of letting another civilisation grow and watch them evolve and advance. This could all be a cycle in a program. Planet X is a wildly speculative theory that has no scientific backing. There are no stable orbits for a planet like this and if it did enter our solar system, the earth and the other planets would be swung out of orbit.