To understand Aliens and Mexicans crossing the Rio Grande, you must visit their native lands and see them in their daily chores and action.
For example, Let us look at the time when the king sent Soldiers with direct instructions
to bring back Elijah and his servant :
---------------------------------------------------------
2Ki 6:8 Then the king of Syria warred against Israel saying, In a certain place shall be my camp
but Elisha the prophet told the king of Israel
10 And the king of Israel thereby saved himself from the King of Syria.
11 Therefore the heart of the king of Syria was troubled at this .
12 And one of his servants said, Elisha, the prophet of Israel, tells the king of Israel all that you say privately.
13 And he said, Go and find him and capture him.
14 The Syrian king sent an army and surrounded the city where Elisha was sitting on a hill.
15 And when the servant of Elisha rose early, behold, an host compassed the city with horses and chariots.
and the servant feared for his life.
16 Elijah said Fear not: for they that are with us are more than they that be with them.
17 And Elisha prayed, and said, LORD, I pray thee, open his eyes, that he may see.
And the LORD opened the eyes of the young man; and he saw: and, behold,
the mountain was full of horses and chariots of fire round about Elisha .
18 And when they came down to him, Elisha prayed unto the LORD, and said, Smite this people, I pray thee, with blindness.
And he smote them with blindness according to the word of Elisha.
19 And Elisha led them to Samaria.
20 And when they were in Samaria, Elisha said, LORD, open the eyes of these men, that they may see.
And the LORD opened their eyes, and they saw; and now they were in Samaria.
-------------------------------------------------------------
Now how does that work ?
God Opened the Servant's Eyes.
Was it a Physical thing or a Mental or spiritual change to the servant in that,
he could see the Chariots of Fire. (Good title for a Movie, eh)
--If the Chariots are Really there but he Army could not see them
then something Physical had to be done to the Servant .
Conclusion:
1. Therefore, Angels are NOT Interdemensional.
2. Humans are not physically equipped to see Angels.
3. Humans can be changed physically to see Angels.
---------------------------------------------------------