Obviously Jainism is much much older than Hinduism. Hinduism is recent phenomenon drawn out of Vedic practices.
In dravid dominated culture and country, indus valley excavations have depicted existence of Shramanic culture which Dravidians were practicing. Principles like Yog, non-violance, Karma , Soul theory were used by dravidians and Jainism . Aryans who invaded india around 3000 years ago were basically nomads from central and eastern europe came on horses defeated dravidians. To call themselves indegeneous , brahminic theory accepted many gods of Jainism, for eg. Rishabdev (which is mentioned in rigveda) was original Jain god much older than any other god was later renamed as Siva (mahadev). Interestingly Siva and Rishab's birthday is same (that is mahasivaratri) and their symbol is same. However Rishabdev was a nude god and brahminic culture mocked him, called god of destruction and renamed as Siva with his character depicted as Linga( because he was nude) sitting infront of Nandi.
Saivism and vaishnavism had no relation with each other being enemies. So hinduism cannot be considered older than 500 years old (named by britishers) and brahminic(vedic religion) cannot be more than 3000 years . There is none of Vedic god or any evidence found in harappa or mohanjodaro,however some futile claims have been made.
Moreover Veda did not believe in any god except rain, fire, earth and sky. Most of present gods are manifestation of these natural powers and hence imaginary. there was no god in Hinduism , there was no karma, soul and non-violance theory in hinduism, It was drawn from Jainism. Brahmins copied everything good from Jainism to replace their religious practices like sacrifice, yagna and meat offering practices.
Many other gods in South India are also actually renamed converted from dravidian jain culture around 800 a.d. by shankaracharya during bhakti movement when thousands of dravidian saints were killed, there are around 200 sites , caves around madurai are witness which are as old as 400 century a.d.
Moreover Ramayana talks about horses, but no horses ever existed in indus valley civilization as per archaelogist, it clear proves vedic religion did not exist in bharat prior to 3000 years. None of god in Hinduism is real , they are imaginary.
My answer Hinduism is offshoot of Jainism and its present name is foreign which was coined by outsiders like britishers or muslism, Only way hinduism can be correlated to Jainism is through a common god called Rishab which was accepted by Vedic system as Siva as jungle god. that is why you see siva (with insult) with opium, snake and tiger skin.
Hinduism is xerox copy of Shramanic system as far as many reincarnated gods are concerned , as far as many principles are concerned.
However no real dravid jains left and only some aryans practicing jainism is what is called jainism which is considered as part of hinduism. But it doesn't mean some hindu's following christianity recently makes christianity as offshoot of Hinduism.
Jainism is world's oldest religion and dravidians is oldest culture (dravidiaans have been made dalits , untouchables by Aryans caste system) which was indegeneous culture and home to bharat.
Bharat king was a Jain king. At present the history what we read in India is manipulated time to time by brahmin forces which gives total wrong facts.
We find better and genuine version of indian history and jain history outside india with modern researchers in west which has factual and evidence based facts.
Hinduism is not a religion , it is a caste based social order.
Jainism is atleast 8000 years old as researched in Canadian universtieis and German universties.
Source: Jainism adn the New Spirituality
by Dr. Vastupal Parikh.