Between stages of gelatin resting, prepare whipped cream and cream cheese mixture as listed below.
In a medium mixing bowl, using an electric hand mixer, whip heavy cream on high speed until soft peaks form.
Add in 1/4 cup confectioners' sugar and whip until stiff peaks form (just shake excess from beater blades, no need to wash for next step).
In a separate large mixing bowl, using hand mixer, blend cream cheese and 2 cups confectioners' sugar until combined.
Add in vanilla and about 14 drops liquid red food coloring, if using; mix until combined.
Increase to high speed and whip until light and fluffy; about 2 minutes.
Mix in strained raspberry puree and add in lukewarm gelatin/water mixture; mix until well combined.
Fold in 1/3 of the whipped cream mixture; add remaining whipped cream and fold just until combined.
Transfer to refrigerator while preparing crust layer (don't chill longer than 30 minutes you don't want it to set).