Californian livestock (including cattle, chickens, etc.) uses approximately 9% of the nation's 2.14 billion gallon/day water on all livestock.[1] This equates to roughly 73 billion gallons per year. The report is a decade old, so I'll round that up to 100 billions of gallons used, per year, on meat products in California.

California almond farmers use 1.1 trillions of gallons per year.[2]

So yes, if anyone is to blame, it is definitely the almond farmers, as they use more than 10 times the amount of water than all meat farmers combined.

[1] https://water.usgs.gov/edu/wulv.html [2] http://www.bbc.com/news/magazine-30052290