Is it normal to not believe in aliens and ufos?

I think it's trying to communicate...

It is prevalent but it is not rational. The acronym "UFO" stands for "unidentified flying object" and has been superseded by the acronym "UAP" (unidentified aerial phenomenon) in the scientific community. Surely one can accept that humans have failed to identify aerial phenomena from time to time. I suspect that what you really mean to say is that you do not believe that any UAP are the spacecraft, interdimensional vessels, and/or time machines of extraterrestrial beings, interdimensional beings, and/or our future selves.

That UAP exist as unidentified aerial phenomena is incontrovertible. What the more difficult to explain UAP are (particularly those of a certain class of them that shares many shocking characteristics), however, is an uncomfortable topic for many people. The vast majority of UAP can be explained away as misidentified aircraft, standard celestial objects, rarely witnessed meteorological phenomena, or even hallucinations and misclassifications resulting from intoxication, hoaxes, mental illness, and/or outright lies.

As physicist, author, and science popularizer, Michio Kaku, is fond of saying, the remaining 5% "give us the willies" because they are not only currently inexplicable from our perspective but they are often somewhat uniform in nature as if there is a single explanation beyond out ability to verify for most of them. Among their many shared characteristics are the ability to change trajectory as if on a whim at clocked speeds ridiculously far in excess of the maximum reached by known state-of-the-art aircraft, the ability to effortlessly jam radar, invisibility, and if not teleportation, the ability to instantaneously accelerate to speeds approaching, reaching, and/or exceeding c (the speed of light and what is thought to be the cosmological speed limit if not the speed of causality itself).

More troubling yet is the typical witnesses of this class of UAP and the nature of the interactions. This class is typically witnessed by pilots on the job, arguably the ultimate witnesses in that they are constantly in the air, always looking at the sky, trained to recognize all manner of aerial objects, in possession of technology to further confirm the encounters, and presumably completely sober on the job. Furthermore, these things often seemingly taunt the pilots in ways that don't seem cruel but reminiscent of a human stopping to play with a cat or a dog for a moment. This is simultaneously assuring and frightening.

It is tempting to write them off as experimental human aircraft, but as all superpowers are bothered by them and as they give the impression of likely being unfathomably superior in ability to the combined military forces of the US, China, and Russia as well as to the capabilities of NASA and private companies like SpaceX, we are really beginning to struggle here.

There is a popular expression in the scientific community that asserts that "it isn't aliens until it's aliens" but there is another expression about things that look and walk like ducks that you might be familiar with. These things appear to be both intelligently controlled and blatantly in violation of the laws of physics as we know them. For now, it simply is what it is.

I will not bother with bringing up the Drake equation or Fermi paradox as your disbelief seems to stem not from lack of supportive data but from religious beliefs. I presume that you feel that the potential existence of extraterrestrials automatically invalidates the existence of your god and that you feel a certain desperation to disprove their existence so as to maintain your faith. I am going to further assume that your god is YHWH and that you are a Christian. That is his name. I don't believe in him but according to your beliefs he created the Earth. We can extrapolate from this that he is not from the Earth and is therefore an extraterrestrial by default. It seems that you already believe in extraterrestrials.

What do you think of that recently declassified video of those UFO things? The one where the pilot was following it and saying "wtf is this shit". That one was kind of weird

Well there’s a high likelihood they exist, you exist. To say they’re visiting earth is a different thing altogether. Logic follows they’d have the same issues to overcome as us, crossing vast distances in space.