We probably thought the same about the US back in the 80s when we were getting our F16s. You never know when and how things could get sour with the Chinese. We need to always work under the impression that in whatever war, we will fight alone. Any ally that shows up is a bonus.
Right that is a good strategy but there is a major difference here. US and China need to be looked at separately bcuz both face vastly different circumstances and both have their different political geostrategic goals.
US tilt toward India to balance a rising China is the cause of leaving Pak aside...added to that are factors like
- Pak is an additional obstacle that keeps India from being able to fully focus on China
- After USSR left Afghanistan and broke into pieces(hence didn't pose as much a threat)...Pak's importance as an ally went way down on the list.
- Although Pak and Israel haven't officially and DIRECTLY ever fought against each other...there is a certain unease. Israel most likely does consider Pak a potential threat...add to that Pak's nuclear weapons and u can see why they would lobby against Pak(and naturally lobby for India then). Israel has a very strong lobby in the US btw.
In contrast China already has a long list of enemies or potential enemies. Japan, Taiwan, Vietnam, India to name a few. There are also potential enemies(or countries either allied with the US or uneasy about China's claims in SCS) like South Korea and Phillipines. In the big scheme of things there's also US and its allies(western European countries, Australia, etc.) that China has to contend with. So China needs all the allies it can get...especially one that would balance India out...and create an additional front for India to worry about(hence dividing Indian forces). With that u can see how China needs Pak just like Pak needs China.
All of that above will hold true for a long time unless somehow one can wave a magic wand and make India and China allies...which isn't going to happen bcuz both have their goals in the region that clash with each other.
In conclusion u r comparing apples and oranges by comparing China and US in terms of their alliance with Pak. Still however it would be best if Pak prepared for a potential war with India as if it would fight alone.
This has nothing to do with the radar thing that was being discussed earlier. For developing key technologies like that...Pak is going to need help(whether from China or some other country willing to help). Pak has very limited resources and lags behind in almost everything. If Pak decided to develop everything by itself...Pak would end up with worse projects than Tejas, Kaveri, Rustom, etc. Lots of money would be thrown for R&D only to come up with things a few decades later that are already obsolete at that point in time.