The driving force behind Al-Qaeda and related groups acts of terrorism is not a profound hatred of air travel. They don’t deeply despise the Boeing 747. They aren’t driven by the belief that the ability to travel from New York to San Francisco in under 7 hours is affront to God.
They hate America and want to perform acts of terrorism to terrorize the country, regardless the venue. Even if we could magically make domestic air travel 100 percent terrorist proof, something that would not be possible without full body CAT scans or colonoscopies to check every body cavities, it would not make us any safer in the aggregate.