The Suez Canal is more significant "American" infrastructure than any set of bridges round here. Domestically and internationally. This is one interest in that region.
The Suez Canal is in Egypt.
I've seen it.
Nevertheless, this is the purpose for propping up Israel out there all this time.
Are you suggesting, we should drop military aid to Egypt and increase military aid to Israel so that Israel can invade Egypt and secure Suez Canal as America's "most important" infrastructure?
If not then what you have posted so far simply justifies military aid to Egypt not Israel.
First Suez is secure just how it is.. for decades.. so we should continue to hose Egypt and Israel down with money. I wont go as far as saying Suez is our most important infrastructure. Maybe in that part of the world, but there are a lot of oil and industry interests to balance against that. We get to share that interest with many other actors, too. Israel is the most significant part of the US-Suez balancing act for obvious reasons. One could look at their/US/Egyptian/Russian history in the Sinai to appreciate why.
You may also consider how aid to Axis and Allies made peace in Europe and even prosperity here. This is very influential in US international relations strategy.
I'm suggesting that there are interests that we throw money at and which have some justifiable cause, even though they're not backyard projects. We still spend $1/4 trillion ? on our own infrastructure every year... just counting the physical infrastructure. There's reason to believe we be would probably be worse off by abandoning international relations $ if only to spend that it on construction projects.
Is that what you're proposing?