5:75 >> If Allah is saying that Messiah was just a messengers..messengers like him have passed away. What does that mean? Because He a.s is a messenger, all others passed away BUT him
OR
He a.s was just a messenger. He a.s passed away just like any other messenger.
I gave this example before.. Here it is again.
Harry is a human. Humans like him do tend to make mistake
Does it mean all humans tend to make mistakes BUT Harry OR Harry is a human.. Harry makes mistakes like other humans do. ? The analogy is in complete accordance to how the verse is presented in quran. Isa a.s was only a messengers. Messengers like him has passed away. Does that mean he did not ? Humans make mistake and so did Harry 
Now that was just one part of the verse.. lets see what else Allah says regarding Jesus a.s in that verse.
" **They both used to eat food "
**
2 words needs to be kept into consideration. 1) BOTH 2) USED TO
If Jesus a.s is alive, then Mary a.s should be alive as well.
If they ‘both’ ‘used to’ eat food.. it needs not to be said that they no longer eats food. From this, we can have 2 conclusions. 1) Since he does NOT eat, he a.s is dead. For a person to remain alive, food is a must.
25:20-And We never sent any Messengers before thee but surely they ate food and walked in the streets. And We make some of you a trial for others. Will you then be steadfast? And thy Lord is All- Seeing.
Another conclusion is, that Jesus a.s cannot be considered God.. or anything like God.. for God eats not.. and messengers do. But at this point in time, he is NOT eating food and is still alive. This violates verse 7:25 ( for being living outside the Earth and still alive ), verse 5:75 (used to eat food, but hes not eating food and is still alive). It does add the possibility of doing shirk as well.. Only allah does not require food to remain, but we have Jesus a.s who is also alive but does not eat. Avoid every little possibility of shirk.. for this is the greatest sin of all.
Lets examine this verse as well. See how beautiful and clear this verse is. Allah first says that messengers before him HAVE ‘passed away’. Now right after the mentioning of passing away, Allah describe the way of passing away by saying 'so if he was to die or be killed’. Allah did not repeat the same word of passing away again. He instead says ‘if he was to die or be killed’ in relation to passing away. What should a sane person conclude again? Messengers before him passed away, some by being killed, others by dying.
In case of Muhammad s.a.w, Allah refers to messengers before him passing away, passing away in 2 ways.. dead or killed… if the same happens to Muhammad PBUH, we are told not to turn our backs on Him.
In case of Isa a.s, messengers like him passed away, and Jesus a.s was a messengers like them as well who passed away. Him and his mother used to eat. They no longer eats. Hence dead.