Jews could have simply followed the spirit of the.law about the day of sabbath as a day to relax, think about God.

But, they read into it a complex set of rules and laws. Then they devise schemes and loopholes to get around those laws. Even employing people to help them get around those rules.

In the end, Jews don't observe the Sabbath in spirit. In much the same way, they circumvent the laws in the host country. They spend their entire lives scheming and scamming the good nature of the rules of society. Everyone can see that they don't follow the mitzvahs of the Bible in spirit. This is the reason why Jesus is always calling the Rabbis hypocrites.