Pick and Mix religion

Dondi said:
...If I were to become Jewish, I'd be going back to the Law...all 613 of them. I had trouble with just the 10....
Nice contemplations, I feel a distinct kinship with the old testament. And an appreciation for the other belief systems. Where do Christians substantiate the 10? And isn't it only the orthodox that worry about all 613? And how many others do some denominations add or use no meat on Friday...etc. And how about the two big Judaic commandments that Jesus reminded us of. Seems like we all pick and choose...

Those that pick and choose less, we determine to be too literal, too fundamental, those that pick and choose more we determine to be wishy washy...so interesting...is that me making a judgemental generalization or generally being judgemental?