It is certainly commendable that most Jews are “tight knit”, but Christians are also encouraged to support one another, both spiritually and in more tangible ways. (Sorry that we often fall short here). But I'm not sure they should be commended for “minding their own business” and not “putting their energy into converting others”, since this is the command of Christ, to, “Go and make disciples of all nations...(Matt 28:19). Failing to do so is to leave those for whom Christ died in darkness and subject to the coming judgement of God. I've recently spent some time with a wonderful Jewish man who bluntly told me, “Most Jews have absolutlely NO interest in converting Gentiles. We are God's Chosen People. If Gentiles all go to hell, they deserve it. What is that to us?” This is a far cry from, “God so loved the WORLD (Gentiles), that He gave His only Son....(John 3:16)
As to your criticism of Christians as “..telling everyone else... very judgmental...watered down... finding Scripture to back up their lifestyle...” All I can do is sigh, bow my head and ask God to forgive my brothers and sisters in Christ (and MYSELF at times) for living FAR below the standard that He set for those who claim to be his followers.
Your pointed criticisms are all too often true, and it is to the shame of the true Church. One day we will have MUCH to explain to our Lord, and I don't see it going smoothly or pleasantly on that Day. Please be patient, God is still working on most of us. But I am thrilled to know a great many who live as sanctified believers every day, showing His love, grace sacrifice to all the lost.
So do not confuse the value of a “cultural faith” with a “salvation faith”. While the Jews have MUCH for which they should be commended, they have rejected their Messiah, whom God promised and then actually SENT to draw them back to Himself! Admire the Jews. Pray for the Jews. But between the two, I would gladly claim as brothers and sisters those battered, former sinners, who often “get it wrong”, and fall short of their own claims. Because, one day, the Righteous One will return, cleanse us FULLY, and welcome us to be with Him forever.
In your later post, you said, "I just want to make God happy and do the right thing." And this is exactly what He wants to accomplish in you. He sacrificed His Son to make it possible and sends His Spirit to fill those who believe in order to make it reality. Trust in Him, keep that "I want to make God happy" attitude and you will find that you do exactly that! May the God of Truth and Holiness bless you each and every day as you live for Him!