The Gita needs to be revered at all times. It represents the vast expanse of all Vedic teachings condensed into 700 verses that have fathomed the length and breath of life, as a process. Many times, because of prior influence of other good scriptures, a person may tend to compare the Gita with them and may unknowingly misinterpret or miscalculate the deeper intentions of the Gita. It becomes vital for a man of intelligence to deliberate on the Gita more deeply, with a purified mind before jumping to conclusions.
The philosophy of Reincarnation is the basis of the law of Karma. Without reincarnation, no law would have any meaning. This is what makes Sanatana Dharma as the eternal law, that which cannot be challenged by any other philosophy. Even science is a toddler when it comes to understanding of the theory of reincarnation. If one understands the philosophy of reincarnation perfectly, spiritual practice shall become the goal of that individual. This is the greatness of the sages of Sanatana Dharma, who have explained reincarnation in the most approachable manner.