No.
Subordinate your position to the line of the organisations in leadership. Support for Palestinian resistance IS supporting the line that they themselves have, and in the current moment they were calling for a ceasefire. Organisations are better placed to make correct decisions on strategy.
If calling for a ceasefire does not require you to express your position on support for or against the resistance then you should utilise whatever position works best in whatever context you have in order to call most strongly for that ceasefire. Compromising your calls for ceasefire by taking up a position on the resistance that doesn't suit the context doesn't really help them.
But also yes, end apartheid.