you pick the parts of the bible you want to follow, ignore the parts you don't. emphasize the parts you like, downplay the parts you don't. this is why we have ten thousand denominations.

there's a book called "year of living biblically" where a guy tries to follow every single rule in the bible for a year and-- after spending the year living in a tent in his living room, not wearing mixed fibers, and being careful not to touch any woman who's on her period including his wife, coworkers, and strangers-- realizes how much of what we emphasize from the bible is based on either current culture, personal preference, or is just plain arbitrary. (same goes for pretty much every other religion by the way)

to prove the point, the author of this article emphasizes "abortion, evolution, and homosexuality" as issues that deserve particular emphasis in modern-day christian doctrine. but these are mostly cultural fights, not religious ones. the bible has pretty much nothing to say on abortion and evolution, and jesus himself never addressed homosexuality. to say that a true christian should be emphasizing those three things is based on nothing. it's your own cultural and personal preferences, and you're retrofitting the bible to them.

so bashing modern churches because they don't emphasize the stuff you've chosen to emphasize for yourself is silly. calling their version of christianity "watered down" while claiming you're doing it right is equally silly.