I practice Catholicism & also do Bhakti by advocating Christ & Krishna`s pastimes. I`m a carnivore & I know what is tamasic & what is sattvic food. Does that make me a better or lesser person than one who is a vegetarian & a devotee of Babaji Mahavatar?
You do what your can... what your spiritual level and practice will reflect how you feel towards God and others.
If you can not feel inclined towards having a sattvic diet, then try to eat prasadam as much as possible. I know that some devotees can be very harsh in their attitudes towards those who eat meat, but at the same time, Krishna prefers that we practice the ideal of daya, or compassion.
In many religions, eating meat is considered contrary to compassion, such as many vegetarian Christians. You will read in the Bible about the Nazoreans who abstain from certain foods, and Paul himself said that if meat causes his brother to stumble, it would be better to eschew it. The Franciscans and other Christians also advocate vegetarianism as an extension of compassion to all of Jehovah's creation.
If you love Krishna and try to follow Jesus Christ, who is an empowered messenger of Krishna, try to be vegetarian, and if not, eating fish is permissible since Jesus himself ate fish, and the lowest animal life form. Never eat the flesh of a cow though...
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Therefore, if food makes my brother stumble, I will never again eat flesh at all, that I may not make my brother stumble."
-- 1 Corinthians 8:13
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Stop tearing down the work of God just for the sake of food. True, all things are clean, but it is injurious to the man who with an occasion for stumbling eats. It is well not to eat flesh or to drink wine or do anything over which your brother stumbles."
Romans 14:20-21