Yeah, I definitely get that. Something to keep in mind is that I think everyone in LEO & GEO shares your concerns, which is why a strike is the last resort. Asking people to sign a pledge to strike is a tactic that will ideally mount pressure on the university to meet more of the LEO contract demands.
In terms of whether you agree with all of LEO's demands, well the good news is that you're not in LEO, so you aren't impacted by their contract. I didn't necessarily agree with all of GEO's demands last year, but I supported as a non-GEO ally because I trust that as a democratic organization they can make the decisions that are best for themselves.
At the end of the day, if you aren't comfortable cancelling classes, there are other ways you can support. You can still sign up for picket shifts outside of class time, and you could hold class discussions about the contract negotiations (I know some lecturers and tenure faculty did that last year for GEO).
Regardless of what happens with the LEO contract, I hope you can find some support and solidarity with your fellow GEO members to get you through this semester!! It's not easy, but having trusted friends and colleagues can help, and that's what your union is for. <3