Not always is warming liquids Assur.
If the food is a solid that contains a small amount of liquid, rhe Rama holds that it can be warmed. (Reb Moshe is Machmir, if you would like to know)
If there is liquid that will ooze out during the warming process, that is Muttar to warm according to almost everybody.
Using a hot plate, acc. to Reb Shlomo Zalman and Reb MOshe is no problem of Mechzi Kemevashel, and if you cover it with aluminum, you can take food out the fridge and put it on your hotplate on shabbos.
Reb Elyashiv says that you should put your food onto an upside-down foil container but you don’t have to go like him, if you don’t want.
You should not push away Halacha for Sholom! Absolutely not!
You can find heterim for Bedieved situations like this and not everything that you are Machmir for at home (although recommended), makes food Assur to eat.
(i will try and post sources for everything later)