If scientific analysis were conclusively to demonstrate certain claims in Buddhism to be false, then we must accept the findings of science and abandon those claims.
I believe that the very purpose of our life is to seek happiness. That is clear. Whether one believes in religion or not, whether one believes in this religion or that religion, we all are seeking something better in life. So, I think, the very motion of our life is towards happiness.
I believe all religions pursue the same goals, that of cultivating human goodness and bringing happiness to all human beings. Though the means might appear different the ends are the same.
The most important thing is practice in daily life; then you can
know gradually the true value of religion. Doctrine is not meant for
mere knowledge, but for the improvement of our minds. In order to do
that, it must be part of our life. If you put religious doctrine in
a building and when you leave the building depart from the practices,
you cannot gain its value.
There is no way to escape death, it is just like trying to escape by four great mountains touching sky. There is no escape from these four mountains of birth, old age, sickness and death.
While it is all very well to distinguish happiness that is transient from that which is lasting, between ephemeral and genuine happiness, the only happiness it is meaningful to speak of when a person is dying from thirst is access to water.
We all want to live a happy life and have a right to do so, whether through work or spiritual practice. I'm subject to destructive emotions like anger and jealousy the same as you, but we all have potential for good too. However, our existing education system is oriented towards material development; neglecting inner values. Consequently we lack a clear awareness of the inner values that are the basis of a happy life.
In our own case, we don't consider the loss of a monastery or a monument the end of our entire way of life. If one monastery is destroyed, sometimes it happens.