This is a linking puzzle with a weak link. The links should form a circle connecting consecutive items and in the end connecting items 1 and 7 as well:

1. A person with the same lastname as a doctor in the Bible. [Hint: Graffiti]

1.-2. A fictional master of the whip.

1. A meteorological phenomenon.

2.-3. A time of the year.

1. The Norwegian translation of one of the most common formulas in Excel.

3.-4. A fascinating love story.

1. The ship of the egg master.

4.-5. Clue 4 and 5 share their firstnames.

1. A German suicide bomber.

5.-6. An actor with the lastname of a vacation activity. [Hint: tomgun]

1. The lastname of the founder of a religious science.

6.-7. Similarity in names.

1. A binocular.

7.-1. Looking at differences and quarrels with the binocular.

But there is a weak link here.
Which of the links is so weak that it can't hold the puzzle together?

The chain breaks between items 3 and 4. Hence, I start my solution with the weak link 3-4, followed by all remaining items and links in increasing order up to the final item 3.

3.-4. A fascinating love story.

West Side Story with Tony and MARIA

1. The ship of the egg master.

SANTA MARIA (one of the ships of Christopher Columbus; egg of Columbus)

4.-5. Clue 4 and 5 share their firstnames.

SANTA CLAUS

1. A German suicide bomber.

CLAUS von Stauffenberg (who tried to assassinate Hitler in July 1944 by planting a bomb)

5.-6. An actor with the lastname of a vacation activity.

Tom CRUISE (who played Stauffenberg in a recent movie; also played in "Top Gun" which might sound vaguely similar to the "tomgun" in the hint)

1. The lastname of the founder of a religious science.

Ron HUBBARD (founder of Scientology Church; Tom Cruise is a member of Scientology)

6.-7. Similarity in names.

1. A binocular.

The HUBBLE telescope

7.-1. Looking at differences and quarrels with the binocular.

Star wars (created by George Lucas)

1. A person with the same lastname as a doctor in the Bible.

George Lucas (Colossians 4:14: Luke the beloved physician and Demas greet you; also director of "American Graffiti" and hence fits with the hint "graffiti")

1.-2. A fictional master of the whip.

INDIANA Jones (created by George Lucas and Steven Spielberg)

1. A meteorological phenomenon.

INDIAN SUMMER

2.-3. A time of the year.

SUMMER

1. The Norwegian translation of one of the most common formulas in Excel.

SUMMERING (Norwegian for the excel command SUM)

• 3.-4. Is just humbug, and therefore the weak link – Enigma Feb 15 '15 at 16:00

Seems a bit lame but here is my progress:

Hint 1 - Luke

Hint 1-2 - Luke Taylor

Hint 4 - Fritz Hansen

Hint 5 - Fritz X

• Why is Fritz Hansen the egg master? – Alexis Feb 14 '15 at 16:25