my mom made my younger sister donate money she put together for ukraine and put it towards tithing

Context, Im 19 (f) a couple years ago my younger sister age 14 (f)at the time started up a fundraising project to raise money for Ukraine refugees. She was able to donate some but the source that she was donating the money to got shut off and she had about $800 left undonated that just sat around. A couple years later (present) and my mom just found the remainder of the money that was supposed to be donated after they moved and is making my sister to write out a tithing slip and donate the rest of those funds to the church. Just pissed off and ranting that it’s going towards something so unethical that already has billions of dollars instead of its original purpose for people who truly need it.