I am sorry to hear of such treatment from a Schengen Border Guard, who
have never read the Schengen Border Guard handbook
http://register.consilium.europa.eu/pdf ... 0.en06.pdf
also in German
http://register.consilium.europa.eu/pdf ... 0.de06.pdf
6. ‘Persons enjoying the Community right of free movement’ are nationals of EU Member
States, EEA countries and Switzerland, as well as members of their family, regardless of
their nationality, accompanying or joining them.
:
:
3. Special rules for checks on certain categories of persons
3.1 Persons enjoying the Community right of free movement
3.1.1 Persons enjoying the Community right of free movement are authorised to cross the border
of a Member State on the basis of the following documents, as a general rule:
– EU, EEA, CH citizens: identity card or passport;
– members of the family of EU, EEA, CH citizens who are nationals of a third country:
passport. They may also be required to have an entry visa, if they are nationals of a third
country subject to the visa obligation, unless they are in possession of a valid residence
permit or card, issued by a Member State (or by EEA countries or CH).
3.1.2 However, if a person enjoying the Community right of free movement does not have the
necessary travel documents or, if required, the necessary visas, the Member State
concerned must, before turning him/her back, give such person every reasonable
opportunity to obtain the necessary documents or have them brought to him/her within a
reasonable period of time or corroborate or prove by other means that he/she is covered by
the right of free movement.
3.1.3 As a consequence, checks on persons enjoying the Community right of free movement
should be limited, as a general rule, to the verification of their identity and nationality
/family ties (so-called “minimum check”, see above point 1.4). No questions concerning
the purpose of travel, travel plans, employment certificate, pay slips, bank statements,
accommodation, means of subsistence or other personal data should therefore be asked to
them.
Using this handbook, I would lodge a complaint.
it was easy to get in actually just quickly check passport and few question then let us go but on our way to out german border almost was going to mark passport. 
