"you think most of the people who support hk even know about whats happening in middle east?"
Some do. Some don't. To know in which proportions, you would need some polls or something, just assuming that the majority of them don't know about what's happening in the middle-east is just that: an assumption.
But again, it's irrelevant, as I said, you don't need to choose between the two, you can care about what's happening in the middle-east and also care about what's happening in HK.
"if you really understand the situation in hk and situation in middle east, im sure everyone would care for the worse situation given all the importance you gave on the limited resources."
No, that's not how humans work, precisely because you're talking about *caring*, and different people care about different things. If you think that people would necessarily care about what you care about, if only they knew what you knew, then you're mistaken.
Data is not independent in humans, it's world-view based. Meaning that the same piece of data can be interpreted to arrive at different conclusions depending on which world-view the person holds. So even those who share your knowledge about the middle-east can still reach different conclusions than you did, because your world-view is based on different axioms than theirs is.
It's exactly why the left and the right can't reconcile in politics: they live in the same world, they see the same things, but their world-view makes them interpret that information differently and it leads them to different conclusions about what should be done.
And of course, since they live in the same world, they may think that the other side is deluded, brainwashed, or even evil, otherwise how could they reach different conclusions while knowing the same things? Because data is world-view based.
It's the tragedy of the limitations of human reasoning: we're blind to what we're blind to.
"people in west are not anymore culturally or emotionally attached to hk more than middle east."
"people in the west" is a HUGE population with VERY different people. Even generalizing a single country is a big approximation, let alone a continent or more.
Some countries are more attached to HK than others, for example English people, from their shared history with HK, are more likely to be concerned about what's happening in HK.
Add to that all the personal incentives like who you know and where you've been, what cultures you feel close to, or what relatives you have, etc... The west, although still in majority caucasian, has had a lot of time to integrate immigration and now has many people from many countries, including countries from Asia, which means that Asian culture has already integrated western culture to some extent. Same for the middle-east, particularly in Europe, who welcomed many immigrants after WWII to rebuild. Of course globalization helped that process quite a bit.
People have reasons to care for either issues, it just depends on the people you'll talk to.
And again, caring about one issue does not prevent from caring about the other.
"its because they are taught/brainwashed to hate china and ignore, downplay the wars and atrocities by west in middle east. go to reddit.com/r/Hong_Kong/ and reddit.com/r/HongKong/ to know the power of western propaganda. those people think others are brainwashed when infact its the opposite."
You're illustrating my point: people who disagree fundamentally about political issues tend to see the other side as brainwashed.
Many of these people think the same thing about you, that you're brainwashed, and that you think they're brainwashed, and that it's actually the opposite.
As long as you see them as people devoid of critical thinking for reaching the conclusions they reached, you will never make any progress with them. If you want to understand them, and you want them to understand you, you'll need to stop this pointless polarization and actually discuss with them without assuming their lack of intellectual abilities or their naivety. You'll have to accept that the conclusions you reached are depending on your world-view, and as such that it's perfectly normal for someone not sharing your world view to reach different conclusions.
And then, maybe, you'll succeed in convincing them of something (or maybe they will, or both, who knows). In any case, that's where you have a chance to make some progress. Just calling them brainwashed accomplishes nothing more than polarization.