classical plagiarism?

i just downloaded a song called:
Helsinki Philharmonic Orchestra / Polytech Male Choir / Leif Segerstam, conductor - SIBELIUS: Finlandia, Op. 26 (version for male choir and orchestra)

and 3 parts are practically identical to things i have heard before:
00:00-00:10 - from one of the star wars movies at about 10-11 seconds i expected to hear a high-pitched flute tone. also this is very similar to a garageband loop.
06:30-06:42 - some music used in a mormon/lds church video where it starts out with the words "come". maybe both are using some old hymn/music, i don't know (i never looked either if the lds video credited anybody else or not).
7:50-7:58 (i don't know where i've heard this before. i think a song with a toy gun popping sound, i'm not sure)