Gurfateh
Well when we perform Jhatka it is not the Sacrifising any thing to Akal.Rather it is Mahaprasad ie Great Bestowel of Akal to us.While doing Jhatka this is the only type of Prasad where Kirpan Bhet(Hand of Mercy belong ing to Akal Touches our food before we eat it) is must and natural.
In Jews and Islam also animals are killed for sacrifises,are they also Brahmins ?
But here we are not the sacrifisers but reciver of Mahaprasad.Das hopes that meat is one of the best food provided to us by Akal and that we recive.
Coming to Tilak Ceromony,We deem weapans are the manifestaion of Akal which will help us to overcome the power in three qualities.Blood is touched to them and later we in Nihung Singhs have the tredition to drink the bowl of iron rich fluied.So it is only touching the Weapn before we drink it.
(it has nothing to do with Shavites which are more a basterdy of Aryans with Drvedain God of Puranas).It is near to pure Dravidian Tribal Culture in Deccan,which is land of the Dravids.
Admin can delete if something not worthy for children is writtan.But das has never drunk blood as yet and in Islam and Jews blood drinking is prohibited but in Bretain there are some dishes which are made up of blood,some time in pie and Mash with liqur(not the Alchohal) some blood could be put in.
African Tribals living in India(Siddis) also have had Tendency to drink blood of animals in wild.So are Masai Tribals of Masai Mara(Kenya) where Cattles are "milked" of thier blood on regular bases, ie blood of animal been used without killing the Animal.
From where the Thing related to Shri Guru Granth Sahib Ji has come.Das has seen Singhs related to Vegi Jathas generating mony by selling Alchohal or some could be doing unjust work while being veggi.Being Veggi is to do with Satto Guna and makes us in Three Qualities so being veggi we may be reborn till we say that we are veggi for some pupose of spritulity.We do and we get the result of the act by having birth.