Your dad is okay with breaking it?

Yes Pastors can do that but unless your dad consent to it, it's also wise not to cause disharmony in the family.

Most of the time, unbelievers are not willing on both situations, but if your dad is rather willing that the taoist idols returned to the temple, that is also another step of victory and it's okay IMO.

Ultimately you still need to pray and lead your dad to Christ. At this present moment, your Father will not understand why those Idols need to be broken and if this aggravate him long term, it will be challenging to share the gospel to Him.

My advise is, you & your mom seek Father God's direct intervention (in prayer) to change your dad's heart to soften. Also pray for divine protection asking God to put his hedge of protection and guardian angels around you and your household.

Pray for Wisdom above all. Pray for anointing, Ask Father God to Rise Up and go ahead of you to dismantle the powers and schemes of the evil one, ask him to send his angels to set your Dad Free from this bondage.

You need to consistently pray doing this everyday until it's done. Without Prayer, the enemy can cause havoc in the situation.

Edit:

And if you believe in Praying in Tongues, Pray in tongues 24/7, as much as you can. It is sword of the spirit offensive, cutting away the devil's works and schemes in divine dimension where it is beyond our boundary.

In the end the dad decided to move the idols to a temple. So I think problem solved in the most peaceful manner already.

No problem (about tagging me). To tagged someone, do this
'['@Sophie']'. Ignore the ' .

Your mum should be grateful that your dad gave in to this, so I really hope she don't 'push' it. The important thing here is to remove the idol from the house and not what to do with the idol. I bet if your dad know your mum's intention, he might just reverse his decision.

I feel its important for a christian to be flexible and show our compassion side. The rigidness reminded me of my grandpa's passing couple of years ago. My half brother and his wife just refuse to pay his respect to my grandpa which really makes me sad. They seems to mixed up the different between paying respect and praying. I was offered (by relative) the incenses to 'pray' to my grandpa and i took it but to me i am only paying my respect to him, not praying to him.

Blindspot is betul. Do it in a way where your dad is comfortable with. Don't force. You want to show your Dad love, which also means being considerate of his feelings. Please coax your mom to not be too harsh to him. Otherwise, it'll become a thorn in his heart and will make things very difficult for your family.

I forgot to mentioned that when tagging, obviously you got to get the name right, else it may go to the wrong person or none at all.
Now, regarding paying respect to the deceased pertaining to our chinese culture, I am sure most if not all staunch/pious christian will not agree with my opinion but its ok.

Let me explain here. Firstly, I DON't do that (paying respect) to idol, whether in the temple or in house of my relative where they worship idol. Secondly, I DON'T do that to deceased of friends. I ONLY do that to close/immediate relatives who is not a christian, in this case, Grandpa 'out of special respect' - if that's how I put it.

And while doing that, my intention is very clear - that I am not worshiping him but am paying my respect - that's why my opinion is, it is not wrong.

I feel the most important thing is, your intention and mind interpretation must be very clear in what you are doing while performing such act and I am sure God knows and understand.

Many a time, due to our rigidity, we are being brand snobbish, arrogant or think we christian are high and mighty, usually and most of the time, starts from our relatives, then close friends and friends who are practicing our previous faith or being born in one. That's one of the reason we christian got a very bad name. This will usually give them more reason to steer clear from Christianity. I always come across (mostly Chinese Buddhist and Taoist believers) have nothing good to say on those chinese who converted to christian and usually this is one of the main reason.

Flexibility don't kill your faith. There are many ways one can pay respect and some may view it as worshiping but my intention and mind is clear.

Lastly, if by doing that for my grandpa during his wake, it will be very 'comforting' for his family and also at time like this that 'black stain' can easily result from your action.
Do what you think is right and God will understand your intention is good and does not shaken your faith in Him.