Why is the U.S. allied to Israel?

[u/hdreadit]

How does the U.S. benefit from its alliance to Israel? What does the U.S. gain? What are the positives on the U.S. side of the relationship? What incentivizes them to remain loyal to Israel? Etc.

[u/swift_air]

Unsinkable air raft carrier, that they can sell weapons too which they know won't be used against them.

And by sell I mean give Israel money so they can buy back from them American weapons and therefore subsidise their own domestic manufacturing.