Y'shayahu / Isaiah 40 has nothing to do with Jesus. G-d is telling Isaiah and the other prophets “Console, console My people," says your G-d.” Y'shayahu / Isaiah 40:1
Some of our sages opine that this comfort is to be given to the Jews in Babylonian Exile who returned from exile after 70 years. Others think the consolation is to the Jews in exile who will all be returned to the land (Eretz Yisrael) in messianic times.
Again, this does not fit Jesus. The Christian bible states clearly that the Romans ran Jerusalem in Jesus' lifetime -- and far from Jerusalem having her sins removed in Jesus' lifetime we're told in the Christian bible that the Sanhedrin and others sinned by seeking Jesus' death (not true, but it is what the Christian bible claims).
Y'shayahu / Isaiah 40:3-4 is speaking of G-d's glory -- not the messiah (glorious or otherwise). "A voice calls, "In the desert, clear the way of the L-rd, straighten out in the wilderness, a highway for our G-d." Every valley shall be raised, and every mountain and hill shall be lowered, and the crooked terrain shall become a plain and the close mountains a campaign."
Some missionaries may say that Jesus preached in the desert and / or wilderness. So what? There are even people alive today preaching in deserts and wilderness -- it means absolutely nothing.
Other missionaries will claim that Y'shayahu / Isaiah 40:3-4 is a prophecy that the messiah would be preceded by a forerunner who would prepare the way for Jesus. Reading the passage where does it speak of a specific person who would come before the messiah? Where does it speak of the messiah?
The passage simply says "A voice calls, "In the desert, clear the way of the L-rd, straighten out in the wilderness, a highway for our G-d." Every valley shall be raised, and every mountain and hill shall be lowered, and the crooked terrain shall become a plain and the close mountains a campaign."
There is absolutely nothing in Y'shayahu / Isaiah 40:3-4 to infer, let alone prophesy, that the messiah would be preceded by a forerunner.
The meaning of the verses are that the returning exiles will find the way clear to return. There will be no "road blocks."
The next two claims are also tied to Y'shayahu / Isaiah 40 -- so yet again the list maker is taking statements about G-d in the T'nach and claiming they are about Jesus with zero support for the claim.