I have no issues disagreeing with a Priest.
For instance, our KofC Council has historically rang the bell for the Salvation Army on a Saturday at 4 locations in our town. We provided manpower to help their fundraising.
This year, one of our Brother Knights asked our Priest if this was acceptable. Our Priest looked over the internet and found a website with two sources saying that the Salvation Army had ties to Planned Parenthood with no other information provided. Just take their word for it. Due to this and the fact they were another church, the Priest said we should not ring the bells for them. This was discussed at one of the meetings I had to miss. Due to the arguments at the meeting it was tabled until the next month.
I learned about this, and did some of my own research. Without knowing the website our Priest used, I happened to come across the same website with the two sources. I printed the page. I also did further research and tried to find the actual information from the two sources. One of the sources wanted you to purchase the info. That same source happened to have lost their 501 C 3 status in 2017, which was for failure to file their tax returns for the previous 3 years, but was still soliciting donations as a 501 C 3. Completely illegal. The other source, I pulled down their tax return from the IRS and found that they did very little good, but paid a ton in salaries and such to their directors. I think they actually used 15% of their millions in revenue for education. This same organization gives Catholic Relief Services a C rating for charities.
At the next meeting I had this information available for our council. After some discussion we took a vote by ballot. We are ringing the bells for the Salvation Army. Our Priest based his decision on faulty information he got off the internet. The Salvation Army clearly has a pro life stance, believing that life begins at conception. They also do a lot of good helping out less fortunate in many communities.
Whether another group is of a different religion or not, if they are doing the work that Christ told us to do by feeding the poor, and helping your neighbor, I can’t see how me standing and ringing a bell for a couple of hours is going against what the Church teaches or what Christ himself tasked us to do.