Not at all. The reason being is simple scriptures like, "
"And I have other sheep, which are not of this fold; those also I must bring, and they will listen to my voice, and they will become one flock, one shepherd."
—John 10:16 "
They will be like, "well the other flock were these aliens." If the aliens do not have religious belief then it will be pushed of as they are actually demons. This is an example of the many excuses theist will use to defend their faith.
It's definitely possible to disprove Christianity today. But the problem is.... the brainwashed Christians are programmed to ignore logic. Sigh...... :/