You young-ins don't know, but the Astros last played the fils in the 1980 NLCS where they were completely screwed over by the umps and fils dirty plays (Pete Rose throwing forearms crashing into Astros catcher Bruce Bochy, among other dirty plays). You can watch the whole series on yt -- complete with Howard Cosell doing color commentary.
Astros Manager Bill Virdon got so mad with the umps BULLSHIT (like the triple-play called by the umps that was reversed because fils manager Dallas Green and that cocksucker Pete Rose cried about it, so the NL president Chub Feeney ordered it to be called a double-play from his seat at the game instead, etc.) that he played the rest of Game 4 Under Official Protest.
The fils had a lot to answer for that 1980 NLCS "win" over the Astros, and I'm so fucking happy to see a Superior Astros team push their shit in to take the World Championship from them!!