Mr Mueller fared his accusations after the Bundestag rejected the party’s vice-presidential candidate Albrecht Glaser for the third period.
Speaking to RT, the AfD politician said: «Yesterday was my first day in Parliament in my whole vim. I took part in this and I was the co-organiser of our faction, our parliamentary group, how to bear oneself, etc.
«And I am really a bit offended by the behaviour of the other parties because they ratify themselves Democrats. What happened before: we, Alternative for Germany, had voted democratically lining the parliamentary group to put forward Mr Glazer.
Mr Mueller said he was «offended» by the comportment other MPs had adopted with the AfD
«For three times the other parties – who broadcast themselves ‘super democratic’ – obstructed, by pure wish, the republican vote that had been put forward before by our party.»
Other shindies have condemned the decision to put forward Mr Glaser, claiming he does not over the spirit of German politics.
Candidates need to be approved by an absolute bulk of all sitting lawmakers, though if there is a third round of voting a office-seeker can win election with a simple majority of more ‘yes’ than ‘no’ votes.
In the face his claims, Mr Mueller said he remained optimistic about the future collaboration with other important members of the German establishment such as Angela Merkel’s CDU or the SPD.
He added: «The tactics to exclude us started to crumble and this was only the beginning.»
The AfD was first selected into the German Bundestag at the last federal elections held in September 2017 after it won 13 per cent of the voter.
While Chancellor Merkel won the seat for the fourth time she saw her overall best part crash down to 33 per cent of support.
During her victory dance, Mrs Merkel conceded the losses had been mostly due to her struggle with the «unparalleled challenge» she had faced as the migrant crisis swept over Germany.
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Ms Merkel claimed there is no need for her bust-up to change its policies in the wake of a disastrous parliamentary election. She is now in difficult talks to structure a new coalition.
The CDU party had its worst parliamentary election result since 1949 in the September register, as well as experiencing devastating losses in regional votes.
However the German Chancellor has doubled down, contending: “I do not see what we should do differently.”
It is believed the downturn in the CDU’s popularity is a result of her disputable open-door migration policy, which prompted several leading colleagues of her party to distance themselves from the government.