More from Anonymous:
On the smichus haparshiyos of Shabbos and Moadim:
Why did this Parsha in the first Posuk start talking about Yom Tov and in the next Posuk talk about Shabbos? The Vilna Gaon provides the answer there are שֵׁשֶׁת יָמִים that are from the Torah but you are allowed to do Melacha for food. The first and last day of Pesach make 2 days and a third is one day of Shavous a Fourth is a single day of Rosh Hashanah and then again 2 days of Succos adding up to 6 days that the Torah gave us But then the last Yom Tov is שַׁבַּת שַׁבָּתוֹן Yom Kippur and Hence the connection of the two Posukim is explained.
.וְלֹא תְחַלְּלוּ אֶת-שֵׁם קָדְשִׁי וְנִקְדַּשְׁתִּי בְּתוֹךְ בְּנֵי יִשְׂרָאֵל
The Posuk seems to be repetitive "do not desecrate my name and I will be holy"? The Posuk is issuing a special warning. The Posuk is addressing certain special situations where there is potential for booth. The airplane minyan has a lot of potential for people who have never seen a davening before to see it first hand and take part aוְנִקְדַּשְׁתִּי ְ but on the flip side it also has potential to be תְחַלְּלוּ אֶת-שֵׁם קָדְשִׁי with people being inconsiderate to the people sitting in this seats closest to the Minyan. Therefore Hashem in this Posuk is telling us see the Posuk when you go to make a Kiddush Hashem make sure וְלֹא תְחַלְּלוּ אֶת-שֵׁם קָדְשִׁי וְנִקְדַּשְׁתִּי.